Science, New Series, Vol. 113, No. 2923, Jan. 5, 1951

Previous Issue: New Series, Vol. 112, No. 2922, Dec. 29, 1950
Next Issue: New Series, Vol. 113, No. 2924, Jan. 12, 1951

Volume Information (2 pp.)
Front Matter (1 p.)
An Announcement of the General Officers of the Association, Elected by the Council at Cleveland Last Week, pp. 3a
Tritium in Nature, pp. 1-2

A. V. Grosse; W. M. Johnston; R. L. Wolfgang; W. F. Libby

Technical Papers

Probable Chromosome Number of Fossil Sequoia and Metasequoia Found in Japan, pp. 3-4

Shigeru Miki; Shigeru Hikita

Destruction of Amino Acids during Filter Paper Chromatography, pp. 4-6

Miriam K. Brush; R. K. Boutwell; A. D. Barton; Charles Heidelberger

Effect of Early Cross Transfusion on X-Irradiation Disease, pp. 6-7

Peter F. Salisbury; Paul E. Rekers; Joseph H. Miller; Norman F. Marti

Methane Gas in Water Well, pp. 7-8

Lloyd W. Fisher; William H. Sawyer

Observations on the Fate of Vertebrate Erythrocytes and Hemoglobin Injected into the Blood of the American Cockroach, (Periplaneta americana L.), pp. 9-10

Sergio Bettini; D. S. Sarkaria; R. L. Patton

The Influence of Amount of Food on the Reproduction Rate and Longevity of a Suctorian (Tokophrya infusionum), pp. 10-11

Maria A. Rudzinska

Photoelectric Spot Analysis of Antimony and Bismuth, pp. 11-12

Toshio Sudo; Kitaro Hayase

Synthesis of Enantiomeric α -Cephalins, pp. 12-13

Erich Baer; Jonas Maurukas; Margaret Russell

Comments and Communications

Replacement Control and Biological Control, pp. 14-15

Robert L. Piemeisel; Eubanks Carsner

Solution of the Problem of "Internal Compensation" in Meso Compounds as Afforded by Studies on Analogous Coordination Complexes, p. 15

Reino W. Hakala

Book Reviews

----------------, p. 16

Physical Chemistry

Walter J. Moore

Review author[s]: Edgar F. Westrum

----------------, pp. 16-17

Principles and Practice of Spectrochemical Analysis

Norman H. Nachtrieb

Review author[s]: Cyrus Feldman

----------------, p. 17

An Introduction to Nematology: Anatomy

B. G. Chitwood; M. B. Chitwood

Review author[s]: Lyell J. Thomas

----------------, pp. 17-18

Botany: An Evolutionary Approach

R. Darnley Gibbs

Review author[s]: Harriet B. Creighton

Scientific Book Register, p. 18
News and Notes, pp. 19-24

Previous Issue: New Series, Vol. 112, No. 2922, Dec. 29, 1950
Next Issue: New Series, Vol. 113, No. 2924, Jan. 12, 1951

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Previous Issue: New Series, Vol. 113, No. 2923, Jan. 5, 1951
Next Issue: New Series, Vol. 113, No. 2925, Jan. 19, 1951

Front Matter (1 p.)
Biophysics, pp. 3a

Ralph W. G. Wyckoff

Science in Bondage, pp. 25-29

H. J. Muller

For a New Academy, pp. 30-31

Hans Nachtsheim

Technical Papers

Experimental Confirmation of a Previously Reported Unusual Finding in the Blood of Cyclotron Workers, pp. 32-34

M. Ingram; S. W. Barnes

Virus Strains of Identical Phenotype but Different Genotype, pp. 34-35

Aaron Novick; Leo Szilard

Paper Disk Columns in Glass Chromatographic Tubes, pp. 35-36

L. Zechmeister

Grasshopper Transmission of Three Plant Viruses, pp. 36-37

H. J. Walters

Selective Damage to Fibroblasts by Desoxycorticosterone in Cultures of Mixed Tissues, pp. 37-39

Ivor Cornman

A Simple Presumptive Test for Toxigenicity of Corynebacteria, pp. 39-40

Florence L. Evans

A Reevaluation of Steroid Nomenclature, pp. 40-42

Frank Kipnis

Comments and Communications

The American Naturalist, p. 43

L. C. Dunn

Intracellular Fat Deposits in the Kidney, p. 43

Maurice L. Silver

Measurements in Colloidal Systems, pp. 43-44

C. E. Marshall

Book Reviews

----------------, p. 45

The Birds of Greenland

Finn Salomonsen

Review author[s]: Ralph S. Palmer

----------------, p. 45

Ionization Chambers and Counters

D. H. Wilkinson

Review author[s]: Robert Beringer

----------------, pp. 45-46

Morphology and Taxonomy of Fungi

Ernst Athearn Bessey

Review author[s]: George P. Child

----------------, p. 46

The Private Life of the Protozoa--And of Their Neighbors, the Metazoa and the Insect Larvae

Winifred Duncan

Review author[s]: Marston Bates

Scientific Book Register, p. 46
News and Notes, pp. 47-50

Previous Issue: New Series, Vol. 113, No. 2923, Jan. 5, 1951
Next Issue: New Series, Vol. 113, No. 2925, Jan. 19, 1951

Science, New Series, Vol. 113, No. 2925, Jan. 19, 1951

Previous Issue: New Series, Vol. 113, No. 2924, Jan. 12, 1951
Next Issue: New Series, Vol. 113, No. 2926, Jan. 26, 1951

Front Matter (1 p.)
Scientific Manpower, pp. 3a

Wadsworth Likely

Principles of Infrared Spectrophotometry, pp. 51-54

Van Zandt Williams

Comments on "Principles of Infrared Spectrophotometry", p. 54

Roland C. Hawes; William S. Gallaway

Technical Papers

The Magnetic Susceptibility of Vitamin B12 and B12b, pp. 55-56

J. C. Wallmann; B. B. Cunningham; M. Calvin

Some Adsorption Colors and Their Significance for Tautomeric and Thermochromic Effects, pp. 56-57

Alexander Schönberg; Wafia Asker

Hydatid Disease (Echinococcosis) in Alaska and the Importance of Rodent Intermediate Hosts, pp. 57-58

Robert Rausch; Everett L. Schiller

The Effect of Maleic Hydrazide on Certain Dehydrogenases in Tissues of Onion Plants, pp. 58-60

F. M. R. Isenberg; M. L. Odland; H. W. Popp; C. O. Jensen

The Effect of Desiccated Thyroid, Iodinated Casein, and Casein on a Rachitogenic Diet, pp. 60-61

I. A. Schechet

Screening of Potential Cancer-Inhibiting Agents, pp. 61-64

Maxwell Gordon; Jean B. Siri; Jane G. Campbell

Utilization of C14-Labeled Glucose by Cardiac Muscle Treated with a Cardiac Glycoside, pp. 64-65

Albert Wollenberger

The Reduction of Triphenyltetrazolium Chloride by Dehydrogenases of Corn Embryos, pp. 65-66

C. O. Jensen; W. Sacks; F. A. Baldauski

Comments and Communications

Paper Ionophoresis, pp. 66-68

E. L. Durrum

On a Recent Proposal to Correct an Error Committed by the International Commission on Zoological Nomenclature at the Paris 1948 Meeting, pp. 68-70

William D. Field; J. F. Gates Clarke; J. G. Franclemont

News and Notes, pp. 71-74

Previous Issue: New Series, Vol. 113, No. 2924, Jan. 12, 1951
Next Issue: New Series, Vol. 113, No. 2926, Jan. 26, 1951

Science, New Series, Vol. 113, No. 2926, Jan. 26, 1951

Previous Issue: New Series, Vol. 113, No. 2925, Jan. 19, 1951
Next Issue: New Series, Vol. 113, No. 2927, Feb. 2, 1951

Front Matter (1 p.)
Physics, pp. 3a

G. P. Harnwell

Max Planck, The Man and His Work, pp. 75-81

Walter Meissner

The Advent of the Quantum Theory, pp. 82-84

Albert Einstein

Fifty Years of Quantum Theory, pp. 85-92

A. Sommerfeld; F. Bopp

Quantum Theory and Chemistry, pp. 92-94

Linus Pauling

Conceptual Foundations of the Quantum Theory, pp. 95-101

Henry Margenau

Technical Papers

Nuclear Models, pp. 101-102

Victor Weisskopf

Regarding Covariant Subtraction of Infinities, pp. 103-104

G. Breit

Nonclassical Reaction Kinetics, pp. 104-105

Henry Eyring; Peter Gibbs

Quantum-Theoretical Densities of Solids at Extreme Compression, pp. 105-107

Walter M. Elsasser

News and Notes, pp. 107-110

Previous Issue: New Series, Vol. 113, No. 2925, Jan. 19, 1951
Next Issue: New Series, Vol. 113, No. 2927, Feb. 2, 1951

Science, New Series, Vol. 113, No. 2927, Feb. 2, 1951

Previous Issue: New Series, Vol. 113, No. 2926, Jan. 26, 1951
Next Issue: New Series, Vol. 113, No. 2928, Feb. 9, 1951

Front Matter (1 p.)
Systematics in Zoology, pp. 3a

Richard E. Blackwelder

Radiocarbon Dates, pp. 111-120

J. R. Arnold; W. F. Libby

Technical Papers

Clotting Time and Reaction Velocity in the Interaction of Bovine Fibrinogen and Thrombin, pp. 121-124

David F. Waugh; Betty J. Livingstone

Radiocarbon Age Measurements and Fossil Man in Mexico, pp. 124-125

Helmut de Terra

Lipase from Molds Grown on Oil Seeds, p. 125

C. V. Ramakrishnan; B. N. Banerjee

In vivo Transformation of D,1-3-Hydroxykynurenine in Xanthurenic Acid, pp. 125-126

L. Musajo; F. M. Chiancone; D. Coppini

Depilatory Action of the Intermediary Polymers of Chloroprene, pp. 126-127

Peter Flesch; Sheldon B. Goldstone

Decomposition of Streptomycin, p. 127

David Pramer; Robert L. Starkey

Comments and Communications

Chemical Research in Israel, p. 128

Ernst D. Bergmann

Chemical Research in Israel, p. 128

Ernst D. Bergmann

The Bible and the Earth's Shape, p. 128

Carl S. Wise

Fern Prothallia under Cultivation for Twelve Years, pp. 128-129

R. L. Walp

Individualistic or Statistical Approach?, p. 129

G. M. Kosolapoff

Errata: A Reevaluation of Steroid Nomenclature, p. 129

Book Reviews

----------------, pp. 130-131

The Flora of Bic and the Gaspé Peninsula, Quebec

H. J. Scoggan

Review author[s]: H. H. Bartlett

----------------, p. 131

Antennas

John D. Kraus

Review author[s]: R. A. Smith

----------------, pp. 131-132

Thoracic Surgery

Richard H. Sweet

Review author[s]: Adrian A. Ehler

----------------, p. 132

Elements of Human Physiology

Miriam Scott Lucas

Review author[s]: Raymond W. Root

Scientific Book Register, p. 132
News and Notes, pp. 133-136

Previous Issue: New Series, Vol. 113, No. 2926, Jan. 26, 1951
Next Issue: New Series, Vol. 113, No. 2928, Feb. 9, 1951

Science, New Series, Vol. 113, No. 2928, Feb. 9, 1951

Previous Issue: New Series, Vol. 113, No. 2927, Feb. 2, 1951
Next Issue: New Series, Vol. 113, No. 2929, Feb. 16, 1951

Front Matter (1 p.)
Better Location for Permanent Headquarters, pp. 3a
Science and Human Affairs, pp. 137-142

E. C. Stakman

Detlev W. Bronk, Scientist, p. 143

Milton O. Lee

Agenda for 1951, pp. 144-145

Kirtley F. Mather

A Report of the Cleveland Meeting December 26-30, 1950, pp. 146-149

Raymond L. Taylor

Association Business, pp. 149-150

Howard A. Meyerhoff

Reports of Sections and Societies, pp. 151-163
News and Notes, pp. 164-168

Previous Issue: New Series, Vol. 113, No. 2927, Feb. 2, 1951
Next Issue: New Series, Vol. 113, No. 2929, Feb. 16, 1951

Science, New Series, Vol. 113, No. 2929, Feb. 16, 1951

Previous Issue: New Series, Vol. 113, No. 2928, Feb. 9, 1951
Next Issue: New Series, Vol. 113, No. 2930, Feb. 23, 1951

Front Matter (1 p.)
Industrial Noise, pp. 3a

Ralph Martin McGrath

The Status and Development of Biophysics, pp. 169-175

Ralph W. Stacy

Technical Papers

The Physiologic Limits of Vision in Physiographic Observation, pp. 176-177

Elizabeth W. Olmsted; Elizabeth P. Olmsted

Intracellular Localization and Distribution of Carbonic Anhydrase in Plants, pp. 177-179

E. R. Waygood; K. A. Clendenning

Animal Protein Factor for the Rat Present in Crude Casein and Its Relationships with Vitamin B12, pp. 179-181

M. Piccioni; A. Rabbi; G. Moruzzi

A Micro Ball Mill for the Disintegration of Bacteria, p. 181

Carl-Göran Hedén

The Purine and Pyrimidine Content of Three Strains of Escherichia coli, pp. 181-182

A. Marshak

A Simplified Technique for Microelectrocoagulation, pp. 182-184

Mychyle W. Johnson; L. J. Manhoff

Glycogen Storage in the Heart in Experimental Renal Hypertension in the Rat, pp. 184-185

Robert W. Lackey

The Direction of Flow in the Blood Vessels of the Infundibular Stalk, p. 185

Russell J. Barrnett; Roy O. Greep

A Universal Line Graph for Estimating Percentage Potency in Multidose Assays, pp. 185-187

Marion B. Sherwood

Potassium Excretion in Rats, pp. 187-188

S. E. Dicker

Silver Nitrate as a Test for Ortho and Para Dihydric Phenols, p. 188

Bernard S. Wildi

Comments and Communications

Dr. Langmuir's Article on Precipitation Control, pp. 189-192

Ferguson Hall; Gardner Emmons; Bernhard Haurwitz; George P. Wadsworth; Hurd C. Willett

Scientific Book Register, p. 192
News and Notes, pp. 193-196

Previous Issue: New Series, Vol. 113, No. 2928, Feb. 9, 1951
Next Issue: New Series, Vol. 113, No. 2930, Feb. 23, 1951

Science, New Series, Vol. 113, No. 2930, Feb. 23, 1951

Previous Issue: New Series, Vol. 113, No. 2929, Feb. 16, 1951
Next Issue: New Series, Vol. 113, No. 2931, Mar. 2, 1951

Front Matter (1 p.)
Earth Sciences, pp. 3a

Louis B. Slichter

Z. W. O., The Netherlands Science Foundation, pp. 197-201

J. H. Bannier

Technical Papers

The Colloid Osmotic Pressure of Serum, pp. 201-202

George Scatchard

Fumagillin (H-3), A New Antibiotic with Amebicidal Properties, pp. 202-203

Max C. McCowen; Maurice E. Callender; John F. Lawlis

Preparations for Electron Microscopy of Residual Chromosomes, pp. 203-206

A. R. T. Denues

Ethanol from Methanol, pp. 206-207

Irving Wender; R. A. Friedel; Milton Orchin

Studies on the Host Range of the Verticillium that Causes Wilt of Mentha piperita L., pp. 207-208

Ralph J. Green

Formation of Thianthrene by a Free Radical Mechanism, pp. 208-210

David A. Shirley; Philip A. Roussel

Acidimetric Titration of Alkali Chloride and Hydrochloride Salts, pp. 210-211

Takeru Higuchi; Jesusa Concha

A Comparison of the Niacin and Pantothenic Acid Content of Certain Cereal Grains Grown under the Same Environmental Conditions, pp. 211-212

J. C. Carroll; Chung-hua Lee Peng

On the Cleavage and Oxidation of Pteroylglutamic Acid by Enzyme Solution, p. 212

Katashi Makino; Kenjiro Yamamoto

Comments and Communications

Editorial Policy, p. 213

G. W. Leeper

Agenda for S.U.N. Commission (I.U.P.A.P.), July 1951, pp. 213-215

F. G. Brickwedde

Cobalt 60 Labeled Vitamin B12 of High Specific Activity, p. 215

Charles Rosenblum; D. T. Woodbury

Operation Lamprey, p. 215

W. James Leach

Book Reviews

----------------, p. 216

Security, Loyalty, and Science

Walter Gellhorn

Review author[s]: David B. Tyler

----------------, pp. 216-217

Contributions to Mathematical Statistics

R. A. Fisher

Review author[s]: W. Edwards Deming

----------------, p. 217

Les Ultravirus des Maladies Humaines

C. Levaditi; P. Lepine

Review author[s]: Malcolm H. Soule

----------------, p. 218

Verstandliche Elemente der Wellenmechanik: Photonen, Freie Elektronen, Einelektronige Atome

Teil I. Karl Jellinek

Review author[s]: George Gamow

----------------, p. 218

The Properties of Metallic Materials at Low Temperatures

P. Litherland Teed

Review author[s]: Dillon Evers

----------------, p. 218

An Atlas of Human Anatomy

Barry J. Anson

Review author[s]: Charles E. Tobin

News and Notes, pp. 219-222

Previous Issue: New Series, Vol. 113, No. 2929, Feb. 16, 1951
Next Issue: New Series, Vol. 113, No. 2931, Mar. 2, 1951

Science, New Series, Vol. 113, No. 2931, Mar. 2, 1951

Previous Issue: New Series, Vol. 113, No. 2930, Feb. 23, 1951
Next Issue: New Series, Vol. 113, No. 2932, Mar. 9, 1951

Front Matter (1 p.)
College Enrollment, pp. 3a

Dael Wolfle

The Alaskan Science Conference, pp. 223-227

John C. Reed; Harold J. Coolidge

Toward a Clearer Concept of Osmotic Quantities in Plant Cells, pp. 228-231

J. Levitt

Technical Papers

The Breeding Site of Drosophila lacicola Patterson, p. 232

Herman T. Spieth

An Improved Micromanipulator for Cellular Micrurgy, pp. 232-234

M. J. Kopac

Constitutional Factors in Resistance to Infection: The Effect of Cortisone on the Pathogenesis of Tuberculosis, pp. 234-237

Max B. Lurie; Peter Zappasodi; Arthur M. Dannenberg; Irene B. Swartz

The Adaptive Increase of the Tryptophan Peroxidase-Oxidase System of Liver, pp. 237-238

W. E. Knox; Alan H. Mehler

Experiments on the Catalytic Exchange of Acetone and Propane with Deuterium, pp. 238-241

Lois Nash Kauder; T. I. Taylor

Adrenal Cholesterol in the Scorbutic Guinea Pig, pp. 241-242

M. Jane Oesterling; C. N. H. Long

A Universal Motion Analyzer Applied to Psychomotor Performance, pp. 242-244

Karl U. Smith; Robert Wehrkamp

Investigation of the Forms of Phosphorus in Neutron-Bombarded Phosphates: Role of Hypophosphate, pp. 244-246

J. G. A. Fiskell

Comments and Communications

Successful Transplantation of a Fertilized Bovine Ovum, p. 247

E. L. Willett; W. G. Black; L. E. Casida; W. H. Stone; P. J. Buckner

Two Points of View, pp. 247-248

Saul W. Rosen; Edmund W. Gelewitz; Frederick Romberg

Perfection None Must Hope to Find, pp. 248-249

Arnold W. Ravin

A Return to Medievalism in Science Teaching, pp. 249-250

Philip Goldstein; Henry Pollet

Mass Mortality and Dinoflagellate Blooms in the Gulf of Mexico, pp. 250-252

Gordon Gunter; Joel W. Hedgpeth; D. A. Hooijer; C. H. Connell; Joy Barnes Cross

Addendum: The International Oxford Conference on Nuclear Physics, p. 252

Erratum: Relationships with Vitamin B12, p. 252

Book Reviews

----------------, p. 253

Childhood and Society

Erik H. Erikson

Review author[s]: Sibylle Escalona

----------------, pp. 253-254

Structural Chemistry of Inorganic Compounds

Walter Hückel

Review author[s]: Wendell M. Latimer

----------------, p. 254

Radio Communication at Ultra High Frequency

John Thomson

Review author[s]: J. M. Lafferty

News and Notes, pp. 255-260

Previous Issue: New Series, Vol. 113, No. 2930, Feb. 23, 1951
Next Issue: New Series, Vol. 113, No. 2932, Mar. 9, 1951

Science, New Series, Vol. 113, No. 2932, Mar. 9, 1951

Previous Issue: New Series, Vol. 113, No. 2931, Mar. 2, 1951
Next Issue: New Series, Vol. 113, No. 2933, Mar. 16, 1951

Front Matter (1 p.)
The Teaching Societies, pp. 3a

Morris Meister

The Chemical Research Laboratory, pp. 261-263
Race and Humanity, pp. 264-266

Th. Dobzhansky

Technical Papers

Minerals from Pumiceous Tuff in Japan, pp. 266-267

Toshio Sudo

The Effect of Magnesium Sulfate on Acid Inactivation of Renal and Intestinal Alkaline Phosphatase, pp. 267-268

Victor M. Emmel

Growth Effects on Chick Fibroblast Cultures of Fractions of Adult and Embryonic Tissue Extracts Following Differential Centrifugation, pp. 268-269

R. S. Hoffman; J. A. Dingwall; W. DeW. Andrus

The Influence of Ascorbic Acid Pretreatment on the Leukocyte Response of Rats Exposed to Sudden Stress, pp. 269-270

Habeeb Bacchus; Charles A. Toompas

The Biological Performance of Osmotic Work. A Redox Pump, pp. 270-273

E. J. Conway

Effect of Aureomycin on the Respiration of Normal Rat Liver Homogenates, p. 273

J. C. Van Meter; J. J. Oleson

A Synthesis of 2-Desoxy-D-Ribose, pp. 273-274

Kiyohiko Ohta; Katashi Makino

The Effect of Sensitization and X-Radiation on the Metabolism of I131 Labeled Proteins, pp. 274-276

F. J. Dixon; S. C. Bukantz; G. J. Dammin

Comments and Communications

Problems of Translation, pp. 277-279

David G. Nichols

Colloid Osmotic Pressure, p. 279

Paul D. Meyer

Book Reviews

----------------, p. 280

Inheritance in Dogs: With Special Reference to Hunting Breeds

Ojvind Winge

Review author[s]: Leon F. Whitney

----------------, pp. 280-281

Principles of Nuclear Chemistry

Russell R. Williams

Review author[s]: G. E. Boyd

----------------, p. 281

Pathologic Physiology: Mechanisms of Disease

William A. Sodeman

Review author[s]: Francis P. Chinard

----------------, pp. 281-282

Nuclear Data

Review author[s]: Rolf M. Steffen

Reviewed in Brief

----------------, p. 282

Methods in Food Analysis Applied to Plant Products

Maynard A. Joslyn

----------------, p. 282

Plastic and Reconstructive Surgery: A Manual of Management

Ferris Smith

----------------, p. 282

Progress in Biophysics and Biophysical Chemistry

J. A. V. Butler; J. T. Randall

----------------, p. 282

Colloidal Dispersions

Earl K. Fischer

----------------, p. 282

Proctology in General Practice

J. Peerman Nesselrod

News and Notes, pp. 283-286

Previous Issue: New Series, Vol. 113, No. 2931, Mar. 2, 1951
Next Issue: New Series, Vol. 113, No. 2933, Mar. 16, 1951

Science, New Series, Vol. 113, No. 2933, Mar. 16, 1951

Previous Issue: New Series, Vol. 113, No. 2932, Mar. 9, 1951
Next Issue: New Series, Vol. 113, No. 2934, Mar. 23, 1951

Front Matter (1 p.)
Use of Manpower, pp. 3a

Howard A. Meyerhoff

The Chemistry of Rod Vision, pp. 287-291

George Wald

Technical Papers

The Informational Capacity of the Human Eye, pp. 292-293

Homer Jacobson

The Percutaneous Absorption of Water, pp. 293-294

Alina S. Szczesniak; Henry Sherman; Robert S. Harris

Social Fitness versus Reproductive Fitness, pp. 294-296

S. C. Reed; J. D. Palm

A Rich Source of γ -Carotene, pp. 296-297

B. L. Smits; H. L. Mitchell

Cavitomic Cotton, pp. 297-300

J. P. Elting

A Mammalian Nerve--Muscle Preparation Suitable for Single-Fiber Experiments, p. 300

Vernon B. Brooks

Fluorescence and Photoinactivation of Snake Poisons, pp. 300-302

Rubens G. Ferri; Rosalvo Guidolin

Nonequivalence of Methyl and Carboxyl Groups in Photometabolism of Acetate by Rhodospirillum rubrum, p. 302

Martin D. Kamen; Samuel J. Ajl; Stanley L. Ranson; Jack M. Siegel

News and Notes, pp. 303-306

Previous Issue: New Series, Vol. 113, No. 2932, Mar. 9, 1951
Next Issue: New Series, Vol. 113, No. 2934, Mar. 23, 1951

Science, New Series, Vol. 113, No. 2934, Mar. 23, 1951

Previous Issue: New Series, Vol. 113, No. 2933, Mar. 16, 1951
Next Issue: New Series, Vol. 113, No. 2935, Mar. 30, 1951

Front Matter (1 p.)
Smog in Space, pp. 3a

Harlow Shapley

Progress of Mathematics in the USSR during the Present Five-Year Plan, pp. 307-308

Robert J. Howerton; Paul W. Howerton

L. Cuénot: 1866-1951, pp. 309-310

Richard Goldschmidt

C. W. M. Poynter: 1875-1950, p. 310

John S. Latta

Technical Papers

Effect of ACTH and Some Adrenocortical Steroids on the Metabolism of Tyrosine and Phenylalanine in Premature Infants, pp. 311-312

S. Z. Levine; Henry L. Barnett; C. Warren Bierman; Helen McNamara

Motion in the Solar Atmosphere as Deduced from Radio Measurements, pp. 312-314

Grote Reber

On the Use of the Capital Letter Prefixes L and D, pp. 314-315

Hubert Bradford Vickery

The Reported Adrenergic Blocking Action of β -Haloethylammonium Compounds, pp. 315-317

James F. Kerwin; Grisella C. Hall; Mark Nickerson; William S. Gump; Richard A. McLean; Edwin J. Fellows; Glenn E. Ullyot

Differentiation of Minimus Type C. diphtheriae by Slow Fermentation of Dextrose, p. 317

Elizabeth I. Parsons; Martin Frobisher

The Histochemical Demonstration of Succinic Dehydrogenase, pp. 317-320

Arnold M. Seligman; Alexander M. Rutenburg

The Validity of Histochemical Phosphatase Methods on the Intracellular Level, pp. 320-325

Alex B. Novikoff

Average Body Temperature in Mice, pp. 325-326

J. S. Hart

Cow Feces and Chick Development, pp. 326-327

H. W. Marlow

Radioactive Calcium in the Study of Additive and Native Supplies in the Soil, pp. 328-329

Henry C. Harris; W. H. MacIntire; C. L. Comar; W. M. Shaw; S. H. Winterberg; S. L. Hood

Comments and Communications

Scholars and the Root of All Evil, pp. 330-333

Gilbert L. Betts; Donald Bauer; V. A. Tiedjens; H. E. Landsberg; Norman J. Holter; A Moneyed Man

Alcohol Metabolism, p. 333

Henry Newman

Alcohol Metabolism, p. 333

Henry Newman

Ecological Use of Meteorological Temperatures, pp. 333-334

Werner A. Baum

Photographic Reproduction of Laboratory Records Directly on Printing Paper, p. 334

J. L. Nickerson; V. V. Glaviano

Book Reviews

----------------, pp. 335-336

The Anatomy of the Gorilla

William King Gregory

Review author[s]: G. E. Erikson

----------------, p. 336

Treatise on Powder Metallurgy: Applied and Physical Metallurgy

Claus G. Goetzel

Review author[s]: Frederick N. Rhines

----------------, pp. 336-337

Advances in Genetics

M. Demerec

Review author[s]: Bentley Glass

----------------, pp. 337-338

Encyclopédie Entomologique: La Biologie des Diptères

E. Séguy

Review author[s]: George A. Edwards

----------------, p. 338

Renal Function

Stanley E. Bradley

Review author[s]: A. V. Wolf

Scientific Book Register, p. 338
News and Notes, pp. 339-344

Previous Issue: New Series, Vol. 113, No. 2933, Mar. 16, 1951
Next Issue: New Series, Vol. 113, No. 2935, Mar. 30, 1951

Science, New Series, Vol. 113, No. 2935, Mar. 30, 1951

Previous Issue: New Series, Vol. 113, No. 2934, Mar. 23, 1951
Next Issue: New Series, Vol. 113, No. 2936, Apr. 6, 1951

Front Matter (1 p.)
Systematic Botany, pp. 3a

David D. Keck

The Earnings of American Men of Science, pp. 345-347

M. H. Trytten; Theresa R. Shapiro

The Widened Lattice Interval and Its Essential Role in the Behavior of Crystalline Metal, pp. 348-352

Donald P. Smith

Technical Papers

Structure of Pan's Crystalline Trisaccharide, pp. 352-353

Dexter French

Physiological Mechanisms of Color Blindness, pp. 353-354

M. Ebe; K. Isobe; K. Motokawa

Chromatographic Separation of Amino Sugars and Amino Acids, Using the N-(2:4-dinitrophenyl) Derivatives, pp. 354-355

P. W. Kent; G. Lawson; A. Senior

Proteins of Liver and Hepatoma Mitochondria, pp. 355-358

George H. Hogeboom; Walter C. Schneider

The Existence of Hyaluronidase Substrate Factors in Microbiological Culture Media, p. 359

George H. Warren; Jane G. Durso

A Simple Laboratory Setup for Rapid Measurement of β -Ray Dosages above 1 rep/sec, pp. 360-361

J. S. Krohmer; William A. McCarthy

Crystalline Fradicin, pp. 361-362

Richard J. Hickey; Phil Harter Hidy

Electron Microscopy of Thin-Sectioned Spirostomum, pp. 362-363

Harold E. Finley

A Comparison of the Number of Circulating Blood Cells in Different Parts of the Circulatory System, pp. 363-364

Daniel L. Azarnoff; Thomas V. Batty; Paul G. Roofe; Marguerite Maffet

Comments and Communications

Stress Indicators, p. 365

George L. Trager

Life behind the Iron Curtain, pp. 365-367

Robert C. Cook; Fedor Bohatirchuk; Stewart Rowe

Separation of Organic and Inorganic Compounds, p. 367

A. C. English

Indonesian Place Names, p. 367

Ashley B. Gurney

Erratum: The Influence of Ascorbic Acid Pretreatment on the Leukocyte Response of Rats Exposed to Sudden Stess, p. 367

Habeeb Bacchus

Book Reviews

----------------, p. 368

Wave Theory of Aberrations

H. H. Hopkins

Review author[s]: R. Kingslake

----------------, p. 368

Dementia Praecox or the Group of Schizophrenias

Eugen Bleuler

Review author[s]: Carl Tillman

----------------, pp. 368-369

Cell and Psyche: The Biology of Purpose

Edmund W. Sinnott

Review author[s]: Ludwig Von Bertalanffy

Scientific Book Register, p. 369
News and Notes, pp. 370-374

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Next Issue: New Series, Vol. 113, No. 2936, Apr. 6, 1951

Science, New Series, Vol. 113, No. 2936, Apr. 6, 1951

Previous Issue: New Series, Vol. 113, No. 2935, Mar. 30, 1951
Next Issue: New Series, Vol. 113, No. 2937, Apr. 13, 1951

Front Matter (1 p.)
Science and the State Department, pp. 3a

J. B. Koepfli

The Australian National University, pp. 375-376

Douglas Copland

Technical Papers

A Purification of the Active Principle of Short Ragweed Pollen, pp. 377-378

Theodore B. Bernstein; Anne L. Mosher; Raymond P. Mariella

The Mg Content of Various Nucleic Acid Compounds, pp. 378-379

Gunnar Jungner

Sound Recording and the Problem of Evidence in Psychiatry, pp. 379-380

Eugene B. Brody; Richard Newman; Fredrick C. Redlich

Some Effects of High Velocity Electrons on Wood, pp. 380-382

E. J. Lawton; W. D. Bellamy; R. E. Hungate; M. P. Bryant; E. Hall

The Determination of Cholinesterase Activity in Whole Brains of Developing Rats, pp. 382-383

Charles J. Metzler; Douglas G. Humm

The Effect of Radiations on Galactozymase Formation in Yeast, pp. 383-384

C. L. Brandt; P. J. Freeman; P. A. Swenson

A Special Cannula for Determination of Blood Flow in the Left Common Coronary Artery of the Dog, pp. 385-386

R. W. Eckstein; J. A. McEachen; J. Demming; W. B. Newberry

Development Abnormalities in Chick Embryos Treated with Sugar, pp. 386-387

Ernest L. Hunt

Quantitative Microdetermination of Amino Acids after Paper Chromatography, pp. 387-388

A. Pereira; J. A. Serra

Evidence for the Heparin Nature of the Nonspecific Hyaluronidase Inhibitor in Tissue Extracts and Blood Serum, pp. 388-389

David Glick; Bengt Sylvén

Control of Covered Smut of Oats by Seed Treatment with an Antibiotic, p. 390

A. W. Henry; E. A. Peterson; R. L. Millar; J. S. Horricks

Comments and Communications

Volcanism--A Contributing Factor to Major Change in Sea Level, p. 391

Elwood C. Zimmerman

Antiquity of Man in America Demonstrated by the Fluorine Test, pp. 391-392

T. D. Stewart

The Formation of Free Alkoxy (RO·) Radicals in Solution, p. 392

M. S. Kharasch; W. Nudenberg; F. Arimoto

Formation of Colloidal Sulfur, p. 392

John O. Edwards

Book Reviews

----------------, p. 393

Culture in Crisis: A Study of the Hopi Indians

Laura Thompson

Review author[s]: M. F. Ashley Montagu

----------------, p. 393

Dirichlet's Principle, Conformal Mapping, and Minimal Surfaces

R. Courant

Review author[s]: D. C. Spencer

----------------, pp. 393-394

Scientific Russian: A Textbook for Classes and Self-Study

James W. Perry

Review author[s]: G. M. Kosolapoff

Scientific Book Register, p. 394
News and Notes, pp. 395-398

Previous Issue: New Series, Vol. 113, No. 2935, Mar. 30, 1951
Next Issue: New Series, Vol. 113, No. 2937, Apr. 13, 1951

Science, New Series, Vol. 113, No. 2937, Apr. 13, 1951

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Next Issue: New Series, Vol. 113, No. 2938, Apr. 20, 1951

Front Matter (1 p.)
Applied Anthropological Research, pp. 3a

Ralph L. Beals

Considerations on Utilization of Scientific Literature, pp. 399-403

Paul Alfred Woke

Technical Papers

The Resistance of DDT-Resistant Drosophila to Other Insecticides, pp. 403-404

Richard Weiner; James F. Crow

The Relation of Oxygen Uptake to Hemoglobin Synthesis, pp. 404-405

Jonas E. Richmond; Kurt I. Altman; Kurt Salomon

Extensibility and Minimum Number of Polypeptide Chains in the Collagen Micelle, pp. 405-407

Piero O. Mustacchi

The Use of Oxalate to Produce Free-Living Cells from Carrot Tissue Cultures, pp. 407-408

Richard D. Northcraft

The Effect of Heated Linseed Oil on Reproduction and Lactation in the Rat, pp. 408-410

Florence A. Farmer; E. W. Crampton; Margaret I. Siddall

Reactions of Mercurial Diuretics with Mono- and Dithiols, pp. 410-412

J. F. Lehman; L. P. Barrack; R. A. Lehman

Sedimentation Cylinder for Particle Size Analysis, pp. 412-413

Carlton J. Leith

Hormonal Influence upon the in vitro Synthesis of Radioactive Fatty Acids, pp. 413-415

R. O. Brady; F. D. W. Lukens; S. Gurin

X-Ray Diffraction Studies of Inclusion Bodies Found in Plants Infected with Tobacco Mosaic Virus, p. 415

M. E. Bergmann; I. Fankuchen

Microscopic Studies of Inclusion Bodies Found in Plants Infected with Tobacco Mosaic Virus, pp. 415-417

M. E. Bergmann

Polymorphism of Pregnenolone Acetate, p. 417

David H. Gould; William Tarpley

Comments and Communications

The 1950 Silly Season, p. 418

Chester R. Longwell

Inaccurate Report, p. 418

Severo Ochoa

The Significance of pH, Ion Activities, and Membrane Potentials in Colloidal Systems, pp. 418-420

Erik Eriksson

Errata: Crystalline Fradicin, p. 420

Book Reviews

----------------, pp. 421-422

Space-Time Structure

Erwin Schrödinger

Review author[s]: Frederik J. Belinfante

----------------, p. 422

Bees: Their Vision, Chemical Senses and Language

Karl Von Frisch

Review author[s]: C. L. Farrar

----------------, p. 422

Muscular Contraction: A Topic in Molecular Physiology

W. F. H. M. Mommaerts

Review author[s]: R. C. Mills

News and Notes, pp. 423-426

Previous Issue: New Series, Vol. 113, No. 2936, Apr. 6, 1951
Next Issue: New Series, Vol. 113, No. 2938, Apr. 20, 1951

Science, New Series, Vol. 113, No. 2938, Apr. 20, 1951

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Next Issue: New Series, Vol. 113, No. 2939, Apr. 27, 1951

Front Matter (1 p.)
Books and the Future, pp. 3a

W. Bradford Wiley

Current Science Reading, pp. 427-429

Kirtley F. Mather

Books, Civilization, and Science, pp. 429-431

Warren Guthrie

Science and Literature, pp. 431-434

J. R. Pierce

The Cosmic Cinema, pp. 434-438

Herbert W. Rand

Book Reviews

----------------, p. 439

De Re Metallica

Georgius Agricola

Review author[s]: Howard A. Meyerhoff

----------------, pp. 439-440

Of Societies and Men

Caryl P. Haskins

Review author[s]: Kingsley Davis

----------------, pp. 440-441

The New You and Heredity

Amram Scheinfeld

Review author[s]: Edward C. Colin

----------------, pp. 441-442

Economic Aspects of Atomic Power

Sam H. Schurr; Jacob Marschak

Review author[s]: John R. Menke

----------------, pp. 442-443

The James River Basin: Past, Present and Future

Review author[s]: Romeo Mansueti

Physics and Mathematics, pp. 443-448

Introductory Nuclear Physics

David Halliday

The Friction and Lubrication of Solids

F. P. Bowden; D. Tabor

Weltsystem, Weltäther und die Relativitätstheorie

Karl Jellinek

Negative Ions

H. S. W. Massey

Mathematics: Queen and Servant of Science

Eric Temple Bell

The Main Stream of Mathematics

Edna E. Kramer

Methods in Climatology

Victor Conrad; L. W. Pollak

Superfluids: Macroscopic Theory of Superconductivity

The Theory of Valuations

O. F. G. Schilling

Review author[s]: Martin Deutsch; M. Eugene Merchant; Edward S. Akeley; D. Ter Haar; Ernest Nagel; H. C. S. Thom; R. P. Hudson; Marshall Hall

Chemistry and Biochemistry, pp. 448-454

Advanced Organic Chemistry

Reynold C. Fuson

Advances in Radiochemistry and in the Methods of Producing Radioelements by Neutron Irradiation

Engelbert Broda

Chemistry and Biology of Proteins

Felix Haurowitz

Fluorine Chemistry

J. H. Simons

The Solubility of Nonelectrolytes

Joel H. Hildebrand; Robert L. Scott

Carotenoids

Paul Karrer; Ernst Jucker

Organic Syntheses

Arthur C. Cope

The Biochemistry of B Vitamins

Roger J. Williams

Bacterial Polysaccharides: Their Chemical and Immunological Aspects

Martin Burger

The Enzymes: Chemistry and Mechanism of Action

James B. Sumner; Karl Myrbäck

Organophosphorus Compounds

Gennady M. Kosolapoff

The Science of Petroleum: Crude Oils, Chemical and Physical Properties

Benjamin T. Brooks; A. E. Dunstan

Review author[s]: Ralph L. Shriner; Glenn T. Seaborg; Philip P. Cohen; E. T. McBee; J. D. Porter; F. P. Zscheile; Elwood V. Jensen; T. H. Jukes; William S. Preston; Eric G. Ball; Richard H. Wiley; Robert W. Schiessler

The Biological Sciences, pp. 454-460

The Life of Vertebrates

J. Z. Young

Researches on Fungi: The Sexual Process in the Uredinales

A. H. Reginald Buller

Genes, Plants and People: Essays on Genetics

C. D. Darlington; K. Mather

Comparative Animal Physiology

C. Ladd Prosser

The Fresh-Water Algae of the United States

Gilbert M. Smith

Chemical Embryology

Jean Brachet

Handbook of Freshwater Fishery Biology

Kenneth D. Carlander

Textbook of Modern Pollen Analysis

Knut Faegri; Johs. Iversen

The Care and Breeding of Laboratory Animals

Edmond J. Farris

Review author[s]: George Gaylord Simpson; Lewis E. Wehmeyer; Kenneth W. Cooper; William H. Cole; Maxwell S. Doty; J. Holtfreter; Karl F. Lagler; Roger P. Wodehouse; S. E. Smith

The Medical Sciences, pp. 460-463

The Transmission of Nerve Impulses at Neuroeffector Junctions and Peripheral Synapses

Arturo Rosenblueth

A Manual of Artificial Radioisotope Therapy

Paul F. Hahn

Toxaemias of Pregnancy: Human and Veterinary

John Hammond; F. J. Browne; G. E. W. Wolstenholme

Structure et Activité Pharmacodynamique des Médicaments du Système Nerveux Végétatif

D. Bovet; F. Bovet-Nitti

The Physiology and Pathology of Exposure to Stress

Hans Selye

Elements of Bacterial Cytology

Georges Knaysi

Review author[s]: G. N. Loofbourrow; Richard H. Chamberlain; Foster S. Kellogg; David Nachmansohn; Arthur Grollman; Ruth Lofgren

Scientific Book Register, pp. 463-464
Book Review Index, p. 464

Comments and Communications

Are There Vestigial Structures in Plants?, p. 465

Irving William Knobloch

A Rapid Method for the Measurement of Carbon 14 in Formamide Solution, pp. 465-466

A. Schwebel; Horace S. Isbell; J. V. Karabinos

The Professional Training of College Teachers, p. 466

T. H. Matthews

Zoological Nomenclature and Microfilm, p. 466

G. Winston Sinclair; Richard E. Blackwelder

News and Notes, pp. 467-472

Previous Issue: New Series, Vol. 113, No. 2937, Apr. 13, 1951
Next Issue: New Series, Vol. 113, No. 2939, Apr. 27, 1951

Science, New Series, Vol. 113, No. 2939, Apr. 27, 1951

Previous Issue: New Series, Vol. 113, No. 2938, Apr. 20, 1951
Next Issue: New Series, Vol. 113, No. 2940, May 4, 1951

Front Matter (1 p.)
More Probes into Interstellar Space, pp. 3a

Harlow Shapley

The National Academy of Sciences: Abstracts of Papers Presented at the Annual Meeting, April 23-25, 1951, pp. 473-484

Technical Papers

Transmission of Plasmodium relictum Grassi & Feletti by Anopheles freeborni Aitken, p. 485

Frances F. Mok

Inhibitory Effect of Cortisone on Dietary Necrotic Liver Degeneration in the Rat, pp. 485-486

Klaus Schwartz

The Anterior Process and the Ossification of the Malleus in Mammals, pp. 486-487

Kamal Wassif

Barrier Island, not "Offshore Bar", pp. 487-488

W. Armstrong Price

A Device for Air Evacuation from an Autoclave Sterilizer, pp. 488-490

Chen Lu-ao

An Enzyme in Endocrine Tissues Which Oxidizes Delta 5-3 Hydroxy Steroids to α, β Unsaturated Ketones, pp. 490-491

L. T. Samuels; M. L. Helmreich; M. B. Lasater; H. Reich

Morphology of the Ovary of Oryza sativa Linn. Var. Plena ("Double Rice"), p. 491

R. M. Datta; A. K. Paul

A Root Disease of Plants Caused by a Nematode of the Genus Trichodorus, pp. 491-493

J. R. Christie; V. G. Perry

Attempt to Show Diffusion of Essential Growth Factors from an Induced Penicillin-Resistant Culture to the Parent Penicillin-Sensitive Strain, pp. 493-494

Joseph L. Stone

An Antidiuretic Substance Obtained by Digestion of Globulin with Pepsin, pp. 494-495

H. Croxatto; G. Rojas; L. Barnafi

An Internally, Electrically Heated, Sintered Glass Filtration Disk, p. 495

Arthur D. Mack

Association Affairs

Gordon Research Conferences: June 18-August 31, 1951, pp. 496-497

W. George Parks

Program at Colby Junior College, pp. 497-499

Program at New Hampton School, pp. 499-501

News and Notes, pp. 501-504

Previous Issue: New Series, Vol. 113, No. 2938, Apr. 20, 1951
Next Issue: New Series, Vol. 113, No. 2940, May 4, 1951

Science, New Series, Vol. 113, No. 2940, May 4, 1951

Previous Issue: New Series, Vol. 113, No. 2939, Apr. 27, 1951
Next Issue: New Series, Vol. 113, No. 2941, May 11, 1951

Front Matter (1 p.)
Infrared Spectroscopy, pp. 3a

Harald H. Nielsen

The Scientist's Attitude toward Government Employment, pp. 505-510

Clark D. Ahlberg; John C. Honey

Technical Papers

Recovery from Radiation Injury, pp. 510-511

L. O. Jacobson; E. L. Simmons; E. K. Marks; J. H. Eldredge

Nitrogen Fixation by Sulfate-Reducing Bacteria Indicated by Nitrogen/Argon Ratios, pp. 511-512

Frederick D. Sisler; Claude E. ZoBell

Studies concerning the Relationship between Chemical Constitution and Biological Activity in a Group of Reversed Carboxyl (RC) Analogues of Acetylcholine, pp. 512-514

F. W. Schueler; H. H. Keasling; R. M. Featherstone

A New Versatile Respirator, pp. 514-515

Curtis Marshall

The West Indian Tree Oyster on the Louisiana Coast, and Notes on Growth of the Three Gulf Coast Oysters, pp. 516-517

Gordon Gunter

Organic Origin of Some Calcareous Sediments from the Red Sea, pp. 517-518

Rushdi Said

A Tissue Culture from Potato Tuber: The Synergistic Action of 2,4-D and of Coconut Milk, pp. 518-520

F. C. Steward; S. M. Caplin

Factors Involved in Blood Clearance of Bacteria, pp. 520-522

Abram B. Stavitsky

The Use of Ion Exchange Resins with Flavonoid Compounds, pp. 522-523

Thomas B. Gage; Quentin L. Morris; Wendell E. Detty; Simon H. Wender

Alteration of Immunological Response in Malignancy: Decline of Proteus Agglutinin, pp. 523-524

I. A. Parfentjev; E. E. Cliffton; F. Duran-Reynals

The Use of Positron-Emitting Radioisotopes for the Localization of Brain Tumors, pp. 525-527

Frank R. Wrenn; Myron L. Good; Philip Handler

Comments and Communications

On Structural Variation in Conifer Wood, p. 528

J. Sen; B. K. Banerjee

The Earth's Origin, p. 528

P. S. Palmer

Undergraduate Chemical Research, pp. 528-529

Ethaline Hartge Cortelyou

A Simple Method of Microradiography Using Ordinary Diagnostic X-Ray Equipment, pp. 530-531

Wallace S. Tirman; Harry W. Banker

Stimulation of Growth of Phytophthora Citrophthora by a Gas Produced by Mucor spinosus, p. 531

A. A. Bitancourt; Victoria Rossetti

Cold-Region Plants, p. 531

Don Ritchie

Economy of Symbols, p. 532

Alan Gregg

Determination of Carbonyl Groups by Reaction with Radioactive Cyanide, and a Simple Means for Estimation of Molecular Weight in Polysaccharides, pp. 532-533

Horace S. Isbell

Book Reviews

----------------, p. 533

Crystal Growth

H. E. Buckley

Review author[s]: Wheeler P. Davey

----------------, pp. 533-535

Problems of Cytology and Evolution in the Pteridophyta

I. Manton

Review author[s]: G. Ledyard Stebbins

----------------, p. 535

The Perception of the Visual World

James J. Gibson

Review author[s]: Kenneth N. Ogle

----------------, pp. 535-536

Plant Biochemistry

James Bonner

Review author[s]: R. F. Dawson

News and Notes, pp. 537-542

Previous Issue: New Series, Vol. 113, No. 2939, Apr. 27, 1951
Next Issue: New Series, Vol. 113, No. 2941, May 11, 1951

Science, New Series, Vol. 113, No. 2941, May 11, 1951

Previous Issue: New Series, Vol. 113, No. 2940, May 4, 1951
Next Issue: New Series, Vol. 113, No. 2942, May 18, 1951

Front Matter (1 p.)
The New Stem Rust Threat, pp. 3a

H. A. Rodenhiser; E. G. Moore

The Origins of American Scientists, pp. 543-545

Robert H. Knapp; Hubert B. Goodrich

Technical Papers

Observations on Radioactive Snows at Ann Arbor, Michigan, pp. 545-546

W. Wayne Meinke

Electromigration in a Cation Exchange Resin, pp. 546-547

K. S. Spiegler; C. D. Coryell

A New Electronic Apparatus for the Measurement of the Fusion Frequency of Flicker, pp. 547-549

Curtis Fritze; Ernst Simonson

A Method for Preparing Slide Mounts of Small Invertebrates, p. 549

M. W. Boesel; Charles M. Vaughn

Roentgen Irradiation of Para-Aminobenzoic Acid Solutions, pp. 549-551

Peter G. Mar; Ivan C. C. Tchaperoff

The Decrease of Critical Flicker Frequency with Age, pp. 551-552

Henryk Misiak

A Nomogram for the Calculation of Relative Centrifugal Force, pp. 552-553

V. P. Dole; G. C. Cotzias

A Laboratory Method for Evaluating the Phytotoxicity or Phytostimulation of Insecticides, pp. 553-555

J. E. Casida; T. C. Allen

Excretion of Gallium by the Rat and by Man, pp. 555-557

E. R. King; Jesse D. Perkinson; H. D. Bruner; Joe Gray

Inhibitory Action of Adrenalin on Growth of Rat Sarcoma, pp. 557-558

Margaret Reed Lewis; Paul Myron Aptekman

Erythrocyte Aggregation Factor in the Plasma and Serum of Patients with Acute Lupus Erythematosus, p. 558

Emil Maro Schleicher

Insect Transmission of Western X-Disease of Peaches, pp. 558-559

H. R. Wolfe; E. W. Anthon; Laurence S. Jones

Comments and Communications

Demineralization of Hard Tissues by Organic Chelating Agents, p. 560

Leo M. Sreebny; Gordon Nikiforuk

Zoological Nomenclature: Notice of Proposed Suspension of the Rules in Certain Cases for the Avoidance of Confusion and the Validation of Current Nomenclatorial Practice (A. (n.s.) 7), pp. 560-561

Francis Hemming

Protochemical Cells, pp. 561-562

Theodore Shedlovsky

Association Affairs

Association Finances, pp. 563-565

Howard A. Meyerhoff

Pacific Division of the American Association for the Advancement of Science, p. 566

Robert C. Miller

Laurentian Hormone Conference, p. 566

Gregory Pincus

Section E, pp. 566-567

News and Notes, pp. 567-570

Previous Issue: New Series, Vol. 113, No. 2940, May 4, 1951
Next Issue: New Series, Vol. 113, No. 2942, May 18, 1951

Science, New Series, Vol. 113, No. 2942, May 18, 1951

Previous Issue: New Series, Vol. 113, No. 2941, May 11, 1951
Next Issue: New Series, Vol. 113, No. 2943, May 25, 1951

Front Matter (1 p.)
Association Business, pp. 3a

Howard A. Meyerhoff

Copyright and the Right to Credit, pp. 571-573

Ralph R. Shaw

The Hall of Fame, pp. 573-574

Bertha L. Lyons

Technical Papers

A Simplified Silver Impregnation Method for Vaginal Smears, pp. 574-576

Gardner M. Riley; S. J. Behrman; B. De Vore

The Use of Ultraviolet Light as a Means of Diagnosing Carnation Mosaic, pp. 576-577

W. D. Thomas; R. R. Baker; Joseph G. Zoril

Abundance of N15 in the Nitrogen Present in Crude Oil and Coal, p. 577

Paul V. Smith; Boyd E. Hudson

Internal Consistency of Determinations of Absolute Optical Configuration by the One-Electron Theory of Optical Rotation, pp. 577-578

John F. Lane

A Special Respiratory System in Mammalian Adrenal Glands, pp. 578-579

Douglas G. Humm; Martin Roeder; Dean C. Watland; Owen F. Kline

The Anesthetic Properties of Xenon in Animals and Human Beings, with Additional Observations on Krypton, pp. 580-582

Stuart C. Cullen; Erwin G. Gross

A Simple Technique for the Identification of Raffinose and Sucrose by Enzymatic Hydrolysis on Paper Chromatograms and the Subsequent Separation of the Hydrolyzed Products by Paper Chromatography, p. 582

Kenneth T. Williams; Arthur Bevenue

Steroid Changes in Incubating Adrenal Homogenates, pp. 582-583

Carl S. Vestling; Gene F. Lata

Comments and Communications

The Medical Sciences Information Exchange of the National Research Council, pp. 584-585

Stella Leche Deignan

Book Reviews

----------------, p. 585

Pharmacological Basis of Penicillin Therapy

Karl H. Beyer

Review author[s]: Henry Welch

----------------, p. 585

Ion Exchange Resins

Robert Kunin; Robert J. Myers

Review author[s]: Kurt A. Kraus

----------------, pp. 585-586

Pituitary-Adrenal Function

Review author[s]: H. B. Van Dyke

Scientific Book Register, p. 586
News and Notes, pp. 587-590

Previous Issue: New Series, Vol. 113, No. 2941, May 11, 1951
Next Issue: New Series, Vol. 113, No. 2943, May 25, 1951

Science, New Series, Vol. 113, No. 2943, May 25, 1951

Previous Issue: New Series, Vol. 113, No. 2942, May 18, 1951
Next Issue: New Series, Vol. 113, No. 2944, Jun. 1, 1951

Front Matter (1 p.)
Geographical Research, pp. 3a

George H. T. Kimble

Ferroelectricity, pp. 591-596

Bernd T. Matthias

Technical Papers

The Mucopolysaccharides of the Ground Substance of Connective Tissue, pp. 596-599

Karl Meyer; Maurice M. Rapport

Tissue Respiration and Body Size, pp. 599-600

L. Von Bertalanffy; W. J. Pirozynski

Effect of Germination on the Carotene Content of Pulses and Cereals, pp. 600-601

Haripada Chattopadhyay; Sachchidananda Banerjee

Deviations from Beer's Law in the Ultraviolet Absorption Spectra of Some Organic Compounds, p. 601

Herbert E. Ungnade; Vernon Kerr; Elizabeth Youse

Arginase Activity in Human Skin, pp. 601-603

Eugene J. Van Scott

A Method of Intravenous Injection of Drugs from a Distance in Conditional Reflex Studies, pp. 603-605

Harry A. Teitelbaum; W. Horsley Gantt

A Suggested Biosynthesis of Cyclopropane Rings, pp. 605-606

Edward M. Kosower

Separation of Rusty Mottle of Cherry from a Ring-Spot--Rusty Mottle Complex, pp. 606-607

J. A. Milbrath

Comments and Communications

The Problem of an International Language, pp. 607-609

H. David Hammond; D. R. Lincicome; Ancel Keys

The Hemolytic Substance Present in Animal Tissues, p. 609

H. Laser

Professorships in Foreign Countries, pp. 609-610

Glenn A. Noble

The Rectangular Earth, p. 610

Cyrus N. Ray

Book Reviews

----------------, p. 611

The Population of India and Pakistan

Kingsley Davis

Review author[s]: Olive I. Reddick

----------------, pp. 611-612

The British Smut Fungi (Ustilaginales)

G. C. Ainsworth; Kathleen Sampson

Review author[s]: J. J. Christensen

----------------, p. 612

Theory of Mental Tests

Harold Gulliksen

Review author[s]: H. H. Remmers

Scientific Book Register, p. 612
News and Notes, pp. 613-616

Previous Issue: New Series, Vol. 113, No. 2942, May 18, 1951
Next Issue: New Series, Vol. 113, No. 2944, Jun. 1, 1951

Science, New Series, Vol. 113, No. 2944, Jun. 1, 1951

Previous Issue: New Series, Vol. 113, No. 2943, May 25, 1951
Next Issue: New Series, Vol. 113, No. 2945, Jun. 8, 1951

Front Matter (1 p.)
Psychology, pp. 3a

Paul R. Farnsworth

The Status and Development of Biophysics, pp. 617-620

Robert S. Alexander; David Pomeroy; Jean Claude Roucayrol; Frederick S. Brackett

Technical Papers

Source of Atmospheric Salts, pp. 620-621

Steve G. Boyce

Eosinopenic Response of Adrenalectomized Mice to a Cutaneous Application of Cortisone, pp. 621-623

Robert S. Speirs

Isolation of Pleuropneumonialike Organisms from the Throats of Humans, pp. 623-624

Paul F. Smith; Harry E. Morton

Atmospheric Nitrous Oxide and the Nitrogen Cycle, pp. 624-625

Arthur Adel

An Analog of Vitamin B12, pp. 625-626

R. P. Buhs; E. G. Newstead; N. R. Trenner

Pulmonary Edema and Hemorrhage Induced by Hypothalamic Lesions in Rats, pp. 626-628

J. E. Gamble; Harry D. Patton

Physiological Availability of Dehydro-L-Ascorbic Acid and Palmitoyl-L-Ascorbic Acid, pp. 628-631

Elmer De Ritter; Norman Cohen; Saul H. Rubin

A Satisfactory Apparatus for Study of Analgesia in Mice, p. 631

James Y. P. Chen; Harry Beckman

Stress and Ketone Body Metabolism, pp. 631-633

Frederick Sargent; C. Frank Consolazio

Book Reviews

----------------, pp. 633-634

Dating the Past: An Introduction to Geochronology

Frederick E. Zeuner

Review author[s]: Edward S. Deevey

----------------, p. 634

Die Theoretischen Grundlagen der Analytischen Chemie

Gunnar Hägg

Review author[s]: Kurt A. Kraus

Scientific Book Register, p. 634

Association Affairs

Preliminary Announcement Seventh Philadelphia Meeting, December 26-31, 1951, pp. 635-636

Raymond L. Taylor

News and Notes, pp. 637-642

Previous Issue: New Series, Vol. 113, No. 2943, May 25, 1951
Next Issue: New Series, Vol. 113, No. 2945, Jun. 8, 1951

Science, New Series, Vol. 113, No. 2945, Jun. 8, 1951

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Next Issue: New Series, Vol. 113, No. 2946, Jun. 15, 1951

Front Matter (1 p.)
Flare Stars and the Radio, pp. 3a

Harlow Shapley

The Importance of Science in American Education, pp. 643-646

Ernst A. Hauser

Technical Papers

Studies on Pollination of Hevea brasiliensis in Puerto Rico, pp. 646-648

H. E. Warmke

Rate of Circulation of the Body Fluid in Adult Tenebrio molitor Linnaeus, Anasa tristis (de Geer), and Murgantia histrionica (Hahn), pp. 648-650

Roderick Craig; N. A. Olson

An Instance of the Occurrence of Carcinogenic Substances in Certain Barnacles, pp. 650-651

Michael B. Shimkin; B. Kenneth Koe; L. Zechmeister

An Analog of Histamine that Stimulates Gastric Acid Secretion without Other Actions of Histamine, p. 651

C. E. Rosiere; M. I. Grossman

Recovery of Tumor Cells from Effects of the Tumor-Inducing Principle in Crown Gall, pp. 651-653

Armin C. Braun

Structural and Insecticidal Relationships in Rotenone, Methoxychlor, and DDT, pp. 653-655

R. W. Hummer; E. E. Kenaga

Results of a Preliminary Survey of Group Endings in Zoological Classifications above the Category of Genus, pp. 655-657

Leonard P. Schultz

The Fungicidal and Nematicidal Properties of Dibromobutene, pp. 657-658

W. A. Kreutzer; C. W. McBeth; Mason Turner; Glenn B. Bergeson; Richard R. Whetstone

The Equilibrium between Vitamin B12 (Cyanocobalamin) and Cyanide Ion, pp. 658-659

John B. Conn; Sara L. Norman; Thomas G. Wartman

Comments and Communications

Theory of Tastes and Odors, pp. 660-661

Abdel Fattah El-Baradi; Geoffrey H. Bourne

Cartesian Diver Balance, pp. 661-662

Soren Lovtrup; Erik Zeuthen

Isolation of Histoplasma capsulatum and Allescheria boydii from Soil, pp. 662-663

L. Ajello; L. D. Zeidberg

Why Do Insects Have Six Legs?, p. 663

Urless N. Lanham

Book Reviews

----------------, pp. 663-664

Population Genetics and Animal Improvement: As Illustrated by the Inheritance of Egg Production

I. Michael Lerner

Review author[s]: Arne W. Nordskog

----------------, p. 664

Learning Theory and Personality Dynamics: Selected Papers

O. Hobart Mowrer

Review author[s]: D. O. Hebb

News and Notes, pp. 665-668

Previous Issue: New Series, Vol. 113, No. 2944, Jun. 1, 1951
Next Issue: New Series, Vol. 113, No. 2946, Jun. 15, 1951

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Next Issue: New Series, Vol. 113, No. 2947, Jun. 22, 1951

Front Matter (1 p.)
Science and Civil Defense, pp. 3a

Millard Caldwell

Atomic Spectra for the Astrophysicist, pp. 669-673

Charlotte E. Moore

Technical Papers

In vitro and in vivo Production of a Ceroidlike Substance from Erythrocytes and Certain Lipids, pp. 673-674

W. Stanley Hartroft

An in vitro Method of Screening Amebicidal Agents Using the Phillips Culture, pp. 674-676

William T. Bradner; George W. Rawson

Changes in the Total Circulating Eosinophile Count in Cyclotron Workers, p. 676

Campbell Moses; Madeline Platt

On the Legality of Restriction of Type Locality, pp. 677-678

E. R. Dunn; L. C. Stuart

The Effect of Distillers' Solubles Containing Fluorine on the Development of Dental Enamel in Swine's Teeth, pp. 678-680

James A. English

Effects of a Supranormal Diet of Glutamic Acid on the Test Performance of Paretics, pp. 681-682

Robert E. Kantor; Frederick E. Boyes

An Improved Apparatus for Measuring the Electrogastrogram, pp. 682-683

Edmund N. Goodman; Irwin A. Ginsberg; Miriam A. Robinson

False Absorption Bands in the Region of 200-230 mμ Caused by Stray Radiation in the Beckman Spectrophotometer, pp. 683-685

Leo J. Saidel; A. Robert Goldfarb; Wallace B. Kalt

Electron Microscope Study of Epidermal Fibers, pp. 685-686

William E. Adolph; Richard F. Baker; George M. Leiby

Effect of Hibernation upon Survival Time Following Whole-Body Irradiation in the Marmot (Marmota monax), pp. 686-688

Falconer Smith; Marie M. Grenan

The Hematologic Effect of Folinic Acid (Citrovorum Factor) in Persons with Pernicious Anemia, pp. 688-689

Thomas Jarrold; Daniel Horrigan; Carl Thompson; Richard W. Vilter

Otitis Media and Audiogenic Seizures in Mice, pp. 689-690

Hubert Frings; Mable Frings

Immunochemical Changes in Chicken Serum during Development of Rous Sarcoma, pp. 690-691

I. A. Parfentjev; F. Duran-Reynals

Survey of Factors Responsible for Reduction of 2,3,5-Triphenyltetrazolium Chloride in Plant Meristems, pp. 692-693

Lorin W. Roberts

The Relationship of Acoustical Energy to the Lethal Effects of Ultrasonic Vibrations on E. coli, pp. 693-695

John P. Horton; M. P. Horwood

Biosynthesis of Radioactive Asparagine from C14O2, pp. 695-696

D. G. Wilson; G. Krotkov; G. B. Reed

Comments and Communications

The Search for Truth, pp. 696-697

Clarence W. Metcalf

Lipoid-Lipoprotein Cholesterol, p. 697

Maurice Feldman; Tobias Weinberg

A Correction to North American Fauna No. 35, pp. 697-698

Howard Campbell

Glycols and Atomized E. coli, pp. 698-699

O. H. Robertson; William Lester; Theodore T. Puck; Rudolph Nagy; Gail Mouromseff

Book Reviews

----------------, pp. 699-700

Microbiology: General and Applied

William Bowen Sarles

Review author[s]: Ruth Lofgren

----------------, p. 700

Protein and Amino Acid Requirements of Mammals

Anthony A. Albanese

Review author[s]: Robert A. Harte

----------------, p. 700

Human Physiology

Bernardo A. Houssay

Review author[s]: A. J. Carlson

----------------, p. 701

The Dispensatory of the United States

Arthur Osol; George E. Farrar

Review author[s]: C. O. Lee

Association Affairs

Second Alaskan Science Conference, pp. 701-702

Branches, p. 702

Academies, p. 702

News and Notes, pp. 703-708

Previous Issue: New Series, Vol. 113, No. 2945, Jun. 8, 1951
Next Issue: New Series, Vol. 113, No. 2947, Jun. 22, 1951

Science, New Series, Vol. 113, No. 2947, Jun. 22, 1951

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Next Issue: New Series, Vol. 113, No. 2948, Jun. 29, 1951

Front Matter (1 p.)
Tornado Forecasting Research, pp. 3a

Ferguson Hall

Electrophoresis as a Criterion of Purity in Proteins, pp. 709-712

Eugene L. Hess

Technical Papers

The Probability that Compound F (17-Hydroxycorticosterone) Is the Hormone Produced by the Normal Human Adrenal Cortex, pp. 713-714

Jerome W. Conn; Lawrence H. Louis; Stefan S. Fajans

Number of Entities Inactivated by X-Rays in Greying of Hair, pp. 714-716

Herman B. Chase

Quantum Yields, Ionic Yields, and Molecular Weights of Proteins, pp. 716-717

A. D. McLaren

Successful Treatment of Ulcer Disease in Brook Trout (Salvelinus fontinalis) with Terramycin, pp. 717-718

S. F. Snieszko; S. B. Friddle; P. J. Griffin

Initiation of Vinyl Polymerization by means of High-Energy Electrons, pp. 718-719

John V. Schmitz; Elliott J. Lawton

Early Sexual Development and Growth of the American Oyster in Louisiana Waters, pp. 719-721

R. Winston Menzel

Direct Tissue Radioautography Technique Applied to Teeth, pp. 721-722

Noel D. Martin; E. S. Slater

Temporary Immobilization of Salamander Larvae by means of Electric Shock, pp. 722-723

Norman E. Kemp; Alonso Gamero-Reyes

Spectrophotometric Determination of Hemoglobin and Oxyhemoglobin in Whole Hemolyzed Blood, pp. 723-725

Gabriel G. Nahas

Colloidophagy in the Human Thyroid Gland, pp. 725-726

C. Alexander Hellwig

Induction and Blossoming of Xanthium, pp. 726-728

R. H. Roberts

Comments and Communications

The International Commission on Zoological Nomenclature and the Name of the Monarch Butterfly, pp. 728-729

R. F. Ferreira d'Almeida; F. José Oiticica

Mathematics and Science, p. 729

A. G. Huntsman

Mathematics and Science, p. 729

A. G. Huntsman

Mathematics and Science, pp. 729-730

A. G. Huntsman

Book Reviews

----------------, p. 730

A Textbook of Geology

Robert M. Garrels

Review author[s]: Herbert P. Woodward

Scientific Book Register, p. 730

Association Affairs

Gordon Research Conferences June 18-August 31, 1951, p. 731

Meeting of the Southwestern Division, pp. 731-732

C. W. Botkin

News and Notes, pp. 733-736

Previous Issue: New Series, Vol. 113, No. 2946, Jun. 15, 1951
Next Issue: New Series, Vol. 113, No. 2948, Jun. 29, 1951

Science, New Series, Vol. 113, No. 2948, Jun. 29, 1951

Previous Issue: New Series, Vol. 113, No. 2947, Jun. 22, 1951
Next Issue: New Series, Vol. 114, No. 2949, Jul. 6, 1951

Volume Information (18 pp.)
Front Matter (1 p.)
Plant Science after Fifty Years, pp. 3a

E. G. Moore; L. E. Childers

Mobilization of Scientific, Engineering, and Medical Manpower: An Interim Report, pp. 737-741

Charles V. Kidd

Technical Papers

The Preparation and Properties of Tetrakistrichlorophosphine Nickel, pp. 742-743

John W. Irvine; Geoffrey Wilkinson

The Respiratory Effect of Ro 2-3198 (3-Hydroxy Phenyldimethylethylammonium Bromide) in Syncurinized Dogs, pp. 743-745

H. H. Su; F. T. Kao; Mary Karp

Liquid Nitrogen as a Tool for Obtaining Homogeneous Bacterial Suspensions, p. 745

Myron Usdin; Jorgen M. Birkeland

Free Selection of Nutrients by Hereditarily Obese Mice, pp. 745-746

Jean Mayer; Margaret M. Dickie; Margaret W. Bates; J. J. Vitale

Hereditary Diabetes in Genetically Obese Mice, pp. 746-747

Jean Mayer; Margaret W. Bates; Margaret M. Dickie

Significance of Endogenous Cholesterol in Arteriosclerosis: Synthesis in Arterial Tissue, pp. 747-749

M. D. Siperstein; I. L. Chaikoff; S. S. Chernick

A Modification of the Schleicher Technique for Detecting the "Erythrocyte Aggregation Factor" in Serum, p. 750

Audrey Fjelde

The Use of Potassium Gluconate in Hypopotassemia, p. 751

Adolph Bernhard

Tetrazolium Salt, pp. 751-754

F. E. Smith

Radioactive Tracers in Solid Solution Investigations, pp. 754-755

William T. Foley; Paul A. Giguere

Comments and Communications

Touché!, p. 755

Wingate M. Johnson

Condensation Globules at Meteor Crater, pp. 755-756

H. H. Nininger

Erratum: An Analog of Vitamin B12, p. 756

R. P. Buhs

News and Notes, pp. 757-762

Previous Issue: New Series, Vol. 113, No. 2947, Jun. 22, 1951
Next Issue: New Series, Vol. 114, No. 2949, Jul. 6, 1951

Science, New Series, Vol. 114, No. 2949, Jul. 6, 1951

Previous Issue: New Series, Vol. 113, No. 2948, Jun. 29, 1951
Next Issue: New Series, Vol. 114, No. 2950, Jul. 13, 1951

Front Matter (3 pp.)
AAAS Administration, pp. 3a
The California Oath, pp. 1-4

J. Peek; P. J. Adams; J. Van Dyke

Technical Papers

Methonium Halides in High Blood Pressure, pp. 4-5

F. Horace Smirk

A Test of the Infrared Absorption Theory of Olfaction, pp. 5-6

A. Theodore Forrester; Wm. E. Parkins

The Potentiation of DDT against Resistant Houseflies by Several Structurally Related Compounds, pp. 6-7

Wooten T. Sumerford; Mary B. Goette; Kenneth D. Quarterman; Sheely L. Schenck

Submarine Canyons: A Joint Product of Rivers and Submarine Processes, pp. 7-9

Francis P. Shepard

Maleic Hydrazide as an Antiauxin in Plants, pp. 9-10

A. C. Leopold; W. H. Klein

A Qualitative Analysis of Capsular Polysaccharides from Cryptococcus neoformans by Filter Paper Chromatography, pp. 10-11

E. Edward Evans; John W. Mehl

The Relationship of Muscle Potassium to the Melanophore-Concentrating Effect of Pressure on the Trout, pp. 11-12

O. H. Robertson

Fluorometric Determination of Nicotinamide by Use of Synthetic Ion Exchange Resins, pp. 12-14

Masaru Kato; Hiroshi Shimizu

The Use of K42-Tagged Erythrocytes in Blood Volume Determinations, pp. 14-15

Rosalyn S. Yalow; Solomon A. Berson

The Metabolism of Blastomyces dermatitidis, Antagonists to the Growth-Inhibiting Effect of Trimeton Maleate, pp. 15-17

Frederick Reiss; Leona Caroline

Visual Acuity and the Normal Tremor of the Eyes, pp. 17-18

Lorrin A. Riggs; Floyd Ratliff

Comments and Communications

Geology in the Grade Schools, p. 19

Dorsey Hager

Physiologic Limits of Vision, pp. 19-20

Monroe J. Hirsch; Frank W. Weymouth; E. P. Olmsted; E. W. Olmsted

A Choice of Difficulties, p. 20

N. W. Pirie

Book Reviews

----------------, pp. 21-22

Natural and Synthetic High Polymers

Kurt H. Meyer

Review author[s]: Harold P. Brown

----------------, p. 22

The Principles of Cloud-Chamber Technique

J. G. Wilson

Review author[s]: W. B. Fretter

Scientific Book Register, p. 22
News and Notes, pp. 23-26

Previous Issue: New Series, Vol. 113, No. 2948, Jun. 29, 1951
Next Issue: New Series, Vol. 114, No. 2950, Jul. 13, 1951

Science, New Series, Vol. 114, No. 2950, Jul. 13, 1951

Previous Issue: New Series, Vol. 114, No. 2949, Jul. 6, 1951
Next Issue: New Series, Vol. 114, No. 2951, Jul. 20, 1951

Front Matter (1 p.)
Laboratory Infections, pp. 3a

S. Edward Sulkin; Robert M. Pike

The Application of Ecological Research to Aquiculture and the Fisheries, pp. 27-30

Curtis L. Newcombe

Technical Papers

Ultracentrifugal Studies of γ -Globulins Prepared by Electrophoresis-Convection, pp. 30-33

John R. Cann; Raymond A. Brown; S. J. Singer; John B. Shumaker; John G. Kirkwood

Unusual Fracture Traverse in Fluorite, pp. 33-34

Carl A. Zapffe

Density of Polystyrene Latex by a Centrifugal Method, pp. 34-35

H. Kahler; B. J. Lloyd

Prolongation of Thiopental Anesthesia in the Mouse by Premedication with Tetraethylthiuram Disulfide ("Antabuse"), pp. 35-36

Nicholas J. Giarman; Ferdinand H. Flick; Joseph M. White

Infrared Microspectrum of Living Muscle Cells, pp. 36-38

Darwin L. Wood

Amino Acid Constituents of Prochromosomes Isolated from Blood Cells of Various Animals, pp. 38-39

G. Yasuzumi; G. Miyao

Effects of an Isolated Dehydrogenase Enzyme and Flavoprotein on the Reduction of Triphenyltetrazolium Chloride, pp. 40-41

Arnold F. Brodie; Joseph S. Gots

The Use and Toxicity of Pontamine Sky Blue, pp. 41-42

Joseph Weinberg; E. M. Greaney; B. Rawlings; Thomas J. Haley

Ion Exchange Separation of Desoxyribonucleotides, pp. 42-43

Robert L. Sinsheimer; James F. Koerner

An Electronic Drinkometer, pp. 43-44

J. Harry Hill; Eliot Stellar

The Role of Thiouracil in the Induction, Growth, and Transplantability of Mouse Thyroid Tumors, pp. 44-46

Harold P. Morris; Celia Dubnik Green

Comments and Communications

Radioactivity of the Hot Springs of Tiberias, p. 46

David B. Rosenblatt

Climate and Culture--New Evidence, pp. 46-47

Paul B. Sears

Illiteracy Triumphant, p. 47

John Pfeiffer

On Requesting Chemicals, p. 48

Jackson P. English

Zoological Nomenclature: Notice of Proposed Suspension of Rules in Certain Cases for Avoidance of Confusion and Validation of Current Nomenclatorial Practice (A. (n.s.) 8), pp. 48-49

Francis Hemming

Erratum, p. 49

Book Reviews

----------------, p. 49

The Wealth of India: A Dictionary of Indian Raw Materials and Industrial Products; Raw Materials, Vol. II, and Industrial Products

B. N. Sastri

Review author[s]: A. F. Banfield

----------------, pp. 49-50

Oral Pathology

Kurt H. Thoma

Review author[s]: Joseph L. Bernier

----------------, p. 50

Studies in Late Tertiary Paleobotany

Daniel I. Axelrod

Review author[s]: Arthur A. Meyerhoff

Scientific Book Register, p. 50
News and Notes, pp. 51-54

Previous Issue: New Series, Vol. 114, No. 2949, Jul. 6, 1951
Next Issue: New Series, Vol. 114, No. 2951, Jul. 20, 1951

Science, New Series, Vol. 114, No. 2951, Jul. 20, 1951

Previous Issue: New Series, Vol. 114, No. 2950, Jul. 13, 1951
Next Issue: New Series, Vol. 114, No. 2952, Jul. 27, 1951

Front Matter (1 p.)
Antibiotic Growth Stimulants, pp. 3a

H. R. Bird

Radiocarbon Datability of Peat, Marl, Caliche, and Archaeological Materials, pp. 55-56

H. H. Bartlett

The Planning of Libraries for Military Research Establishments, pp. 57-59

Saul Herner; M. K. Heatwole

Technical Papers

Technetium in the Sun, pp. 59-61

Charlotte E. Moore

A Simple, Inexpensive Microhomogenizer, pp. 61-62

Herbert Brendler

Autoxidation in Lactating Mammary Gland Tissue, pp. 62-63

Richard Owen Moore; Walter L. Nelson

Concerning Orthography of Scientific Names, pp. 63-64

Jir̆í Paclt

Probable Extreme Age of Pegmatites from Southern Rhodesia, pp. 64-65

L. H. Ahrens; A. M. Macgregor

Static Electrification of Solid Particles by Spraying, pp. 66-68

S. J. Czyzak; D. T. Williams

Prevalence of Escherichia coli Strains Exhibiting Genetic Recombination, pp. 68-69

Joshua Lederberg

The Mode of Action of Growth Substances and Growth Inhibitors, pp. 69-70

H. Linser; K. Kaindl

Desoxyribonucleic Acid Content of Rat Liver Nuclei Influenced by Diet, pp. 70-73

J. O. Ely; M. H. Ross

A Suggested Simplification of Blood Volume Analysis Using the Dye T1824, p. 73

Seymour L. Shapiro

Comments and Communications

In vitro Production of Cortisone, pp. 74-75

A. Grevenstuk; Eric Ellenbogen; Harry Seneca

The Monarch Butterfly, pp. 75-76

N. D. Riley

Up or Down?, p. 76

Chapman Grant

Erratum, p. 76

G. W. Rawson

Book Reviews

----------------, p. 77

Remington's Practice of Pharmacy

E. Fullerton Cook; Eric W. Martin

Review author[s]: M. L. Neuroth

----------------, pp. 77-78

Yellow Fever

George K. Strode

Review author[s]: E. Harold Hinman

----------------, p. 78

Sourcebook on Atomic Energy

Samuel Glasstone

Review author[s]: Karl Lark-Horovitz

----------------, pp. 78-79

Biometric Analysis: An Introduction

Alan E. Treloar

Review author[s]: F. M. Wadley

Scientific Book Register, p. 79
News and Notes, pp. 80-84

Previous Issue: New Series, Vol. 114, No. 2950, Jul. 13, 1951
Next Issue: New Series, Vol. 114, No. 2952, Jul. 27, 1951

Science, New Series, Vol. 114, No. 2952, Jul. 27, 1951

Previous Issue: New Series, Vol. 114, No. 2951, Jul. 20, 1951
Next Issue: New Series, Vol. 114, No. 2953, Aug. 3, 1951

Front Matter (1 p.)
Mathematical Biology, pp. 3a

Anatol Rapoport; H. G. Landau

New Developments in Potassium and Cell Physiology: 1940-50, pp. 85-91

C. W. Sheppard

Technical Papers

Natural Black Uranium Powder, pp. 91-92

Paul F. Kerr

Plant Growth-Regulating Activity in Certain Aryloxyalkylcarboxylic Acids, pp. 92-93

D. J. Osborne; R. L. Wain

Crystalline α -Lipoic Acid: A Catalytic Agent Associated with Pyruvate Dehydrogenase, pp. 93-94

Lester J. Reed; Betty G. DeBusk; I. C. Gunsalus; Carl S. Hornberger

The Green Pigment and Physiology of Guard Cells, pp. 94-95

R. O. Freeland

Growth of Human Leukemic Leucocytes in vitro and in vivo as Measured by Uptake of P32 in Desoxyribose Nucleic Acid, pp. 95-98

Edwin E. Osgood; Jonah G. Li; Harold Tivey; Marie L. Duerst; Arthur J. Seaman

D-Catechol and Antihistaminogenesis, pp. 98-99

Saul Malkiel; Margaret D. Werle

Counting of Radioactivity in Liquid Samples, pp. 99-100

R. F. Goddu; L. B. Rogers

A Volumetric Microrespirometer for Studies of Tissue Metabolism, pp. 100-103

Reidar Wennesland

A New Common Biochemical Property of Tumors Derived from Different Tissues, pp. 103-107

Christopher Carruthers; Valentina Suntzeff

Comments and Communications

Scientific Manpower, pp. 107-108

E. L. Hess; S. E. Owen; H. V. Parsley; W. T. Scott; H. D. Slade

The Reservist Problem, pp. 108-109

Reservist

Microfilm Publication, p. 109

LeRoy H. Harvey

Nondiffusibility of Alkaline Phosphatase in Fixed Tissue, p. 109

Florence Moog

Sui Generis, p. 109

Julian S. Huxley

A Note to the Department of Internal Revenue, pp. 109-110

Gladys C. Schwesinger

Observations on Purine Metabolism, p. 110

Maxwell Gordon

Association Affairs

Gordon Research Conference June 18-August 31, 1951, p. 111

Academies, p. 111

News and Notes, pp. 112-116

Previous Issue: New Series, Vol. 114, No. 2951, Jul. 20, 1951
Next Issue: New Series, Vol. 114, No. 2953, Aug. 3, 1951

Science, New Series, Vol. 114, No. 2953, Aug. 3, 1951

Previous Issue: New Series, Vol. 114, No. 2952, Jul. 27, 1951
Next Issue: New Series, Vol. 114, No. 2954, Aug. 10, 1951

Front Matter (1 p.)
The Uncommon Metals, pp. 3a

Bruce W. Gonser

Learning and the Associative Pathways of the Human Cerebral Cortex, pp. 117-120

Karl U. Smith

Technical Papers

Photolabile Pigments in Invertebrates, pp. 120-121

James C. Peskin

Ethylene Dibromide for Destroying Fruit Fly Infestations in Fruits and Vegetables, p. 122

J. W. Balock

Formation of a Competitive Antagonist of Vitamin B12 by Oxidation, pp. 122-123

J. M. Beiler; J. N. Moss; Gustav J. Martin

Functional Activity of the Sweat Glands in the Hairy Skin of the Dog, pp. 123-124

Tsuyoshi Aoki; Masao Wada

The Quantitative Relationship between pH and the Activity of Weak Acids and Bases in Biological Experiments, pp. 124-126

E. W. Simon; H. Beevers

Loose Carbonate Accretions from Carlsbad Caverns, New Mexico, pp. 126-127

Donald M. Black

Associations of Rust and Virus Infections, pp. 127-128

C. E. Yarwood

Spectrophotometric Determinations of Esterases, pp. 128-130

B. H. J. Hofstee

Resistance of a Protein-Montmorillonite Complex to Decomposition by Soil Microorganisms, pp. 130-131

L. A. Pinck; F. E. Allison

Screening Effect of Vitamin C on the Inactivation of Leaf Phosphatase by Ultraviolet Light, pp. 131-132

R. Das; K. V. Giri

Intermittent Loud Noise and Mental Performance, pp. 132-133

Kendon R. Smith

Comments and Communications

Science Communications, pp. 134-135

William F. Hewitt

Book Reviews

----------------, pp. 135-137

Marine Geology

Ph. H. Kuenen

Review author[s]: W. H. Twenhofel

----------------, p. 137

Lehrbuch der Theoretischen Physik: Struktur der Materie

Walter Weizel

Review author[s]: George Gamow

Scientific Book Register, p. 137
News and Notes, pp. 138-142

Previous Issue: New Series, Vol. 114, No. 2952, Jul. 27, 1951
Next Issue: New Series, Vol. 114, No. 2954, Aug. 10, 1951

Science, New Series, Vol. 114, No. 2954, Aug. 10, 1951

Previous Issue: New Series, Vol. 114, No. 2953, Aug. 3, 1951
Next Issue: New Series, Vol. 114, No. 2955, Aug. 17, 1951

Front Matter (1 p.)
The Association's Program, pp. 3a

Howard A. Meyerhoff

A New Approach to High Resolution Radioautography, pp. 143-149

R. M. Fink

Technical Papers

The Influence of Skin Temperature upon the Pain Threshold as Evoked by Thermal Radiation, pp. 149-150

James D. Hardy; Helen Goodell; Harold G. Wolff

Chylomicrons as Carriers for Carcinogenic Hydrocarbons, pp. 151-152

Kai Setälä; Pentti Ermala

A New Development in the Measurement of High Relative Humidities, pp. 152-153

Walter R. Steiger

The Inability of Thiourea to Modify Roentgen Ray Irradiation Mortality in Rats, pp. 153-154

Thomas J. Haley; Samuel Mann; Andrew H. Dowdy

Should a "Law of Recency" Be Added to the International Code of Zoological Nomenclature?, pp. 154-156

Roy D. Shenefelt; J. T. Medler

Ultraviolet Absorption Spectra of Proteins, pp. 156-157

A. R. Goldfarb; L. J. Saidel

The Value of Small Lead Shields against the Injurious Effect of Total-Body Irradiation, pp. 157-158

J. Gershon-Cohen; M. B. Hermel; J. Q. Griffith

Plant Growth-Stimulating Hormones in Immature Bean Seeds, pp. 159-161

John W. Mitchell; Dorothy P. Skaggs; W. Powell Anderson

Comments and Communications

Discriminatory Practices, pp. 161-162

Lee Lorch

Nuttall Memorial Celebration, p. 162

Alan Boyden

Book Reviews

----------------, p. 163

Ecology of Animal Parasites

Jean G. Baer

Review author[s]: Asa C. Chandler

----------------, p. 163

Photometric Atlas of the near Infra-Red Solar Spectrum, λ 8,465 to λ 25,242

Orren C. Mohler

Review author[s]: K. W. Meissner

----------------, p. 164

Trends in Gerontology

Nathan W. Shock

A Classified Bibliography of Gerontology and Geriatrics

Nathan W. Shock

Conference on Problems of Aging

Review author[s]: C. M. McCay

----------------, p. 164

A History of Medicine: Primitive and Archaic Medicine

Henry E. Sigerist

Review author[s]: Malcolm H. Soule

News and Notes, pp. 165-170

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Next Issue: New Series, Vol. 114, No. 2955, Aug. 17, 1951

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Next Issue: New Series, Vol. 114, No. 2956, Aug. 24, 1951

Front Matter (1 p.)
National Bureau of Standards: A Semicentennial, pp. 3a

E. U. Condon

Information, Measurement, and Quantum Mechanics, pp. 171-175

Jerome Rothstein

Technical Papers

An Approach to the Microscopy of Molecules, pp. 175-177

Marsden S. Blois

Peptide Structure and Denaturation of Proteins, pp. 177-178

A. R. Goldfarb

A Method for Embedding Undecalcified Bone for Histologic Sectioning, and Its Application to Radioautography, pp. 178-180

James S. Arnold

A Simple Method for Extirpating an Experimental Tumor, pp. 180-181

Paul A. Zahl

Tubal Malignancy--A Method for Collecting Specimens for Cytologic Study, p. 181

K. Sheldon MacLean

Action of Genes Affecting Secondary Sex Ratio in Man, pp. 181-182

Marianne E. Bernstein

A Method for the Rapid Preparation of Histological Sections, p. 182

John A. Tornaben; Edwin J. de Beer

An Apparatus for Determining Bone Density by means of Radioactive Strontium (Sr90), pp. 182-185

F. Gaynor Evans; Carl C. Coolbaugh; Milton Lebow

Some Effects of High-Intensity Ultrasound on Tobacco Mosaic Virus, pp. 185-186

Nelson Newton

Report on Fossil Vertebrates from the Upper Magdalena Valley, Colombia, pp. 186-187

Donald E. Savage

Effects of Various Analgesics on Inflammatory Edema Resulting from Silver Nitrate Injection, pp. 187-188

Annette La Belle; John A. Tornaben

Levels of Nucleotide in the Blood during Shock, pp. 188-189

George T. Hoffmann; Antonio Rottino; Harry Albaum

Book Reviews

----------------, p. 190

Die Binnengewässer. Bd. XVIII, Verbreitungsgeschichte der Süsswassertierwelt Europas

August Thienemann

Review author[s]: G. E. Hutchinson

----------------, pp. 190-191

Patterns of Sexual Behavior

Clellan S. Ford; Frank A. Beach

Review author[s]: Carl R. Moore

----------------, p. 191

Researches in Binocular Vision

Kenneth N. Ogle

Review author[s]: Henry G. Wagner

----------------, pp. 191-192

Mathematical Engineering Analysis

Rufus Oldenburger

Review author[s]: R. v. Mises

----------------, p. 192

Petroleum Geology

Kenneth K. Landes

Review author[s]: M. G. Frey

Scientific Book Register, p. 192

Association Affairs

Los Angeles Meeting of the Pacific Division, AAAS, pp. 193-194

Robert C. Miller

News and Notes, pp. 195-198

Previous Issue: New Series, Vol. 114, No. 2954, Aug. 10, 1951
Next Issue: New Series, Vol. 114, No. 2956, Aug. 24, 1951

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Next Issue: New Series, Vol. 114, No. 2957, Aug. 31, 1951

Front Matter (1 p.)
Chemicals as Farming Tools, pp. 3a

R. M. Salter

The Binocular Fusion of Yellow in Relation to Color Theories, pp. 199-202

Leo M. Hurvich; Dorothea Jameson

Technical Papers

A Correlation of Severity of 2,4-D Injury with Stage of Ontogeny in Monocot Stems, p. 203

Arthur J. Eames

Piedmont Plains of India and Pakistan, p. 204

H. L. Chhibber

Free Amino Acids in Potato Tubers Altered by 2,4-D Treatment of Plants, pp. 204-205

Merle G. Payne; Jess L. Fults; Ruth J. Hay

The Growth of Peanut Plants at Various Diurnal and Nocturnal Temperatures, pp. 205-206

William P. Jacobs

The Antimicrobial Principle of Clematis dioscoreifolia, p. 206

Werner Herz; Anne Louise Pates; Grace C. Madsen

The Chemical Kinetics of Procaine and Chloroprocaine Hydrolysis, pp. 206-208

Manuel Aven; Francis F. Foldes

The Oncological Aspect of the "Immunity" of Colchicum to Colchicine, pp. 208-210

László J. Havas; August Baldensperger

Changes in Biliary Cholesterol in Abnormal Thyroid States, pp. 210-211

Ray H. Rosenman; Meyer Friedman; Sanford O. Byers

Notes on the Strontium Content of Sea Water, Celestite Radiolaria, and Strontianite Snail Shells, pp. 211-213

Howard T. Odum

Vitamin B12 in Activated Sewage Sludge, p. 213

Sam R. Hoover; Lenore B. Jasewicz; Nandor Porges

Comments and Communications

Origins of Scientists, p. 214

Donald H. Sweet

Rats in Relationship to Man's Welfare, pp. 214-215

John B. Calhoun

Geode Note, p. 215

Percival Robertson

La Cellule Nerveuse, pp. 215-216

Murray L. Barr

Account Balanced, p. 216

Homer W. Smith

Meteorological Data in Ecology, pp. 216-217

Angus M. Woodbury

Book Reviews

----------------, p. 217

Theory of Electrons

L. Rosenfeld

Review author[s]: Hubert M. James

----------------, pp. 217-218

Amino Acids and Proteins: Theory, Methods, Application

David M. Greenberg

Review author[s]: H. B. Vickery

Reviewed in Brief

----------------, p. 218

The Growth of Physical Science

James Jeans

----------------, p. 218

Methods in Medical Research

Julius H. Comroe

----------------, p. 218

Methods in Medical Research

Ralph W. Gerard

Scientific Book Register, pp. 218-219

Association Affairs

The Seventh Philadelphia Meeting December 26-31, 1951, pp. 219-221

Raymond L. Taylor

News and Notes, pp. 222-226

Previous Issue: New Series, Vol. 114, No. 2955, Aug. 17, 1951
Next Issue: New Series, Vol. 114, No. 2957, Aug. 31, 1951

Science, New Series, Vol. 114, No. 2957, Aug. 31, 1951

Previous Issue: New Series, Vol. 114, No. 2956, Aug. 24, 1951
Next Issue: New Series, Vol. 114, No. 2958, Sep. 7, 1951

Front Matter (1 p.)
Seventy-Five Years of Chemistry, pp. 3a

Walter J. Murphy

Contemporary Psychology in the Soviet Union, pp. 227-233

Ivan D. London

Technical Papers

Eocene Volcanism in Central Utah, p. 234

Siegfried Muessig

Inadequate Stimulation of Olfaction, pp. 234-236

Amos Turk; Kenneth Bownes

A Simple Method of Mounting Gross Biologic Material in Plastic Boxes, pp. 236-237

Thomas W. Farmer; Ludlow M. Pence; Marian Moeller

The Thromboplastic Activity of Hyaluronate, pp. 237-239

S. K. Abul-Haj; Jean Watson; J. F. Rinehart; E. W. Page

Tobacco Mosaic Virus Mutation, pp. 239-240

James Johnson

The Formation of Cycloparaffins in Petroleums, pp. 240-241

Benjamin T. Brooks

Effect of Colchicine on Regeneration in Pelmatohydra oligactis, pp. 241-242

Frank M. Sturtevant; Ruthann P. Sturtevant; C. L. Turner

The Use of a Precision Lathe in the Preparation of Biological Thin Sections, pp. 242-243

Zach M. Arnold

Subcutaneous Implantation of Cortisone Pellets in Rheumatoid Arthritis, p. 243

Edward Henderson; John W. Gray; Marvin Weinberg; Evelyn Z. Merrick

Book Reviews

----------------, p. 244

Josiah Willard Gibbs: The History of a Great Mind

Lynde Phelps Wheeler

Review author[s]: Henry Guerlac

----------------, pp. 244-245

The Polarographic Method of Analysis

Otto H. Müller

Review author[s]: James J. Lingane

----------------, p. 245

Physiological Mechanisms in Animal Behaviour

Review author[s]: Eliot Stellar

Scientific Book Register, p. 245

Association Affairs

Questions for the September Conference, p. 246

Warren Weaver

News and Notes, pp. 247-252

Previous Issue: New Series, Vol. 114, No. 2956, Aug. 24, 1951
Next Issue: New Series, Vol. 114, No. 2958, Sep. 7, 1951

Science, New Series, Vol. 114, No. 2958, Sep. 7, 1951

Previous Issue: New Series, Vol. 114, No. 2957, Aug. 31, 1951
Next Issue: New Series, Vol. 114, No. 2959, Sep. 14, 1951

Front Matter (1 p.)
Quantitative Biology, pp. 3a

Ernst Caspari

A Critical Evaluation of Quantitative Histo-and Cytochemical Microscopic Techniques, pp. 253-258

David Glick; Arne Engstrom; Bo G. Malmstrom

Technical Papers

Oxygenation of Blood by Isolated Lung, pp. 258-259

George R. Gerst; Jacob Grossman; Adrian Kantrowitz

Duration of Action of Residual DDT Deposits on Adobe Surfaces, pp. 259-262

W. G. Downs; E. Bordas; L. Navarro

A Simple Humidifying System for a Small High-Humidity Room, pp. 262-264

James H. M. Henderson; David L. Hunt

Competitive Action of 2-Thiouracil and Uracil in AAF-induced Cancer of the Liver, pp. 264-265

K. E. Paschkis; A. Cantarow; J. Stasney

Homologous Mechanism of Bactericidal Action and Gram-Staining, pp. 265-266

Roland Fischer; S. Seidenberg

News and Notes, pp. 267-270

Previous Issue: New Series, Vol. 114, No. 2957, Aug. 31, 1951
Next Issue: New Series, Vol. 114, No. 2959, Sep. 14, 1951

Science, New Series, Vol. 114, No. 2959, Sep. 14, 1951

Previous Issue: New Series, Vol. 114, No. 2958, Sep. 7, 1951
Next Issue: New Series, Vol. 114, No. 2960, Sep. 21, 1951

Front Matter (1 p.)
American Archaeology, pp. 3a

Gordon R. Willey

Biological Control of Weeds in Compacted Soil Cultures, pp. 271-274

V. P. Sokoloff

Technical Papers

Absorption Spectra of Chlorophylls in Solutions at Low Temperatures--Equilibria between Isomers, pp. 275-276

Simon Freed; Kenneth M. Sancier

The Pulmonary Circulation as a Source of Leucocytes and Platelets in Man, pp. 276-277

H. R. Bierman; K. H. Kelly; F. W. King; N. L. Petrakis

Effects of Male Hormone upon the Tail of the Slider Turtle, Pseudemys scripta troostii, pp. 277-279

L. T. Evans

Microspectrophotometry and Cytochemical Analysis of Nucleic Acids, pp. 279-280

Hiroto Naora

A Medium for the Study of the Bacterial Oxidation of Ferrous Iron, pp. 280-281

William W. Leathen; Lois D. McIntyre; S. A. Braley

Lactic Dehydrogenase and DPN-Ase Activity of Blood, pp. 281-283

Spyridon G. A. Alivisatos; Orville F. Denstedt

Low-Temperature Sterilization of Organic Tissue by High-Voltage Cathode-Ray Irradiation, pp. 283-285

Irving A. Meeker; Robert E. Gross

Comments and Communications

Krebiozen, pp. 285-286

C. P. Rhoads; A. C. Ivy

News and Notes, pp. 287-290

Previous Issue: New Series, Vol. 114, No. 2958, Sep. 7, 1951
Next Issue: New Series, Vol. 114, No. 2960, Sep. 21, 1951

Science, New Series, Vol. 114, No. 2960, Sep. 21, 1951

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Next Issue: New Series, Vol. 114, No. 2961, Sep. 28, 1951

Front Matter (1 p.)
Phosphorus Metabolism, pp. 3a

Bentley Glass

Radiocarbon Dates, II, pp. 291-296

W. F. Libby

Technical Papers

Some Properties of an Ascorbic Acid Oxidation Inhibitor in Vegetables, pp. 296-298

Barbara J. Branthoover; Margaret McGregor Hard

Prolongation of Clotting Time in Dormant Estivating Mammals, pp. 298-299

Arthur Svihla; Howard R. Bowman; Ruth Ritenour

Reversed Phase Partition Chromatography of Steroids on Silicone-Treated Paper, pp. 299-300

Theodore H. Kritchevsky; Arne Tiselius

The Alarm Reaction and the Hibernating Gland, p. 300

Paavo Suomalainen; Anna-Maija Herlevi

A Method for Dissection and Electrical Study in vitro of Mammalian Central Nervous Tissue, pp. 300-302

Donald O. Rudin; George Eisenman

Lewis Evans' Early American Notice of Isostacy, pp. 302-303

George W. White

Liver Cirrhosis with Ascites, Induced in Dogs by Chronic Massive Hepatic Irradiation with Radioactive Colloidal Gold, pp. 303-305

P. F. Hahn; Marvin A. Jackson; Horace Goldie

Comments and Communications

Trenches in Venezuelan Archeology, p. 306

J. M. Cruxent

Tissue Respiration and Body Size, pp. 306-307

Knut Schmidt-Nielsen; Ludwig Von Bertalanffy; W. J. Pitozynski

Time of Flowering of Delonix regia, pp. 307-308

George N. Wolcott

Filing Lantern Slides, p. 308

Robert Wolf; Louise Stemmle; Frederick F. Yonkman

Book Reviews

----------------, p. 309

Plant Growth Substances

Folke Skoog

Review author[s]: Aubrey W. Naylor

----------------, pp. 309-310

L'Evolution Biologique: Les Faits, Les Incertitudes

Lucien Cuénot

Review author[s]: Richard Goldschmidt

----------------, p. 310

Selected Topics in X-Ray Crystallography from the Delft X-Ray Institutes

J. Bouman

Review author[s]: W. P. Binnie

Scientific Book Register, p. 310
News and Notes, pp. 311-314

Previous Issue: New Series, Vol. 114, No. 2959, Sep. 14, 1951
Next Issue: New Series, Vol. 114, No. 2961, Sep. 28, 1951

Science, New Series, Vol. 114, No. 2961, Sep. 28, 1951

Previous Issue: New Series, Vol. 114, No. 2960, Sep. 21, 1951
Next Issue: New Series, Vol. 114, No. 2962, Oct. 5, 1951

Front Matter (1 p.)
The Class of '02, pp. 3a

Howard A. Meyerhoff

Differential Systematics, pp. 315-322

William H. Womble

Technical Papers

Contaminating Bacteria in Plant Tumor Tissues, pp. 322-323

William J. Robbins; Annette Hervey

The Isolation of Histoplasma capsulatum from Soil in an Unused Silo, pp. 323-324

J. T. Grayston; C. G. Loosli; E. R. Alexander

Differential Effects of Cerebellar Anterior Lobe Cortex and Fastigial Nuclei on Postural Tonus in the Cat, pp. 324-325

William W. Chambers; James M. Sprague

The Pharmacologic Analysis of Intestinal Stimulants, pp. 325-326

Sydney Ellis

The Bacterial Oxidation of Tryptophan: A Study in Comparative Biochemistry, pp. 326-330

R. Y. Stanier; O. Hayaishi

The Ultraviolet Absorption Spectra of Some Heterocyclic Phosphorous Compounds, p. 330

Arthur Furst; Robert J. Horvat

The Effect of Aureomycin and Vitamins on the Growth Rate of Chicks, pp. 330-331

Jacob Biely; B. March

Comments and Communications

How Does the Ivy Grow?, p. 332

Sumner Zacks

Training Leaders in Science and Religion, p. 332

John R. Sampey

Gantt to the Rescue!, pp. 332-333

W. Horsley Gantt

Lascaux Charcoal, p. 333

Elso S. Barghoorn; Hallam L. Movius

Lascaux Charcoal, p. 333

Elso S Barghoorn; Hallam L. Movius

Stability of Disodium Adenosine Triphosphate, pp. 333-334

S. A. Morell; S. H. Lipton; Alexander Frieden

Book Reviews

----------------, pp. 334-335

Quantum Mechanics

Alfred Landé

Perturbation Methods in the Quantum Mechanics of n-Electron Systems

E. M. Corson

Review author[s]: L. H. Thomas

----------------, pp. 335-336

Stratigraphy and Sedimentation

W. C. Krumbein; L. L. Sloss

Review author[s]: Carl O. Dunbar

----------------, p. 336

The Origin of the Earth

W. M. Smart

Review author[s]: D. ter Haar

----------------, p. 336

Genetic Neurology: Problems of the Development, Growth, and Regeneration of the Nervous System and of Its Functions

Review author[s]: Jerzy E. Rose

News and Notes, pp. 337-340

Previous Issue: New Series, Vol. 114, No. 2960, Sep. 21, 1951
Next Issue: New Series, Vol. 114, No. 2962, Oct. 5, 1951

Science, New Series, Vol. 114, No. 2962, Oct. 5, 1951

Previous Issue: New Series, Vol. 114, No. 2961, Sep. 28, 1951
Next Issue: New Series, Vol. 114, No. 2963, Oct. 12, 1951

Front Matter (1 p.)
New Tools for Research, pp. 3a

William A. Wildhack

Chemical Analysis by Neutron Spectroscopy, pp. 341-355

T. I. Taylor; Robert H. Anderson; W. W. Havens

A Microfluorometric Scanner for the Differential Detection of Cells: Application to Exfoliative Cytology, pp. 356-360

Robert C. Mellors; Reuben Silver

Technical Papers

Series-Aiding Phototube Bridge, pp. 360-361

L. G. Glasser

A Simple Instrument for the Determination of ACH, pp. 361-362

J. B. Davidson

Barostat for High-Altitude Chamber, pp. 362-363

H. F. Brubach; H. Specht

Determination of Radioactivity by Solution in a Liquid Scintillator, pp. 363-364

M. S. Raben; N. Bloembergen

A Recording Warburg Apparatus, pp. 364-367

William Arnold; E. W. Burdette; J. B. Davidson

Comments and Communications

The Exponential Decay Law in Spray De-Electrification, p. 368

Chester T. O'Konski

A Simple Sampling Device for Submerged Cultures, pp. 368-369

H. A. Walch; G. J. Jann; A. J. Salle

Book Reviews

----------------, pp. 369-370

Industrial Medicine on the Plutonium Project

Robert S. Stone

Review author[s]: M. Ingram

----------------, p. 370

Reports on Progress in Physics

A. C. Stickland

Review author[s]: L. I. Schiff

----------------, p. 371

Eyes in Industry: A Comprehensive Book on Eyesight Written for Industrial Workers

Dorothy Adams Campbell; W. J. B. Riddell; Arthur Salusbury MacNalty

Review author[s]: Josef Brožek

Association Affairs

The Association's Annual Exposition of Science and Industry, pp. 372-373

Raymond L. Taylor

News and Notes, pp. 374-378

Previous Issue: New Series, Vol. 114, No. 2961, Sep. 28, 1951
Next Issue: New Series, Vol. 114, No. 2963, Oct. 12, 1951

Science, New Series, Vol. 114, No. 2963, Oct. 12, 1951

Previous Issue: New Series, Vol. 114, No. 2962, Oct. 5, 1951
Next Issue: New Series, Vol. 114, No. 2964, Oct. 19, 1951

Front Matter (1 p.)
Lobbying for Science, pp. 3a

Wadsworth Likely

The Need for General Laws in the Social Sciences, pp. 379-382

E. W. Leaver; J. J. Brown

Arnold Sommerfeld: 1868-1951, pp. 383-384

Linus Pauling

Technical Papers

A New Class of Hypnotics: Unsaturated Carbinols, pp. 384-385

S. Margolin; P. Perlman; F. Villani; T. H. McGavack

The Life Span of the Red Blood Cell in Chronic Leukemia and Polycythemia, pp. 385-387

Nathaniel I. Berlin; John H. Lawrence; Helen C. Lee

Tissue Cytochrome c and Prevention of Experimental Atherosclerosis, p. 387

J. Mardones; J. Monsalve; M. Vial; M. Plaza de los Reyes

A Selective Medium for the Isolation of Coccidioides immitis, pp. 387-389

Lucille K. Georg; Libero Ajello; Morris A. Gordon

The Experimental Production of Lipid Deposition in Excised Arteries, pp. 389-393

Sigmund L. Wilens

Mango Grafting in Eight Weeks, p. 393

L. B. Singh

Temperature-Dependent Characteristics of an Adenylpyrophosphatase Preparation from Potatoes, pp. 393-395

Kwan-Hua Lee; John J. Eiler

Nudibranch Spicules Made of Amorphous Calcium Carbonate, p. 395

Howard T. Odum

The Heparinoid Nature of a Serum Mucoprotein, pp. 395-397

Ezra M. Greenspan

The Percutaneous Absorption of Water Vapor, p. 397

C. W. DeLong

Comments and Communications

Ascorbic Acid in Tea, p. 398

Israel S. Kleiner

A Basic Feature of the Chambers' Micromanipulator, pp. 398-399

Robert Chambers

Information Wanted, p. 399

Harry A. Wilmer

Language Problems in Science, pp. 399-400

Knut Faegri; R. R. Newell

Book Reviews

----------------, p. 400

Culture Worlds

Richard Joel Russell; Fred Bowerman Kniffen

Review author[s]: Huey Louis Kostanick

----------------, pp. 400-401

Nutrition and Chemical Growth in Childhood: Calculated Data

Icie G. Macy

Review author[s]: Selma E. Snyderman

----------------, p. 401

Handbook of Human Engineering Data for Design Engineers

Review author[s]: Dael Wolfle

News and Notes, pp. 402-406

Previous Issue: New Series, Vol. 114, No. 2962, Oct. 5, 1951
Next Issue: New Series, Vol. 114, No. 2964, Oct. 19, 1951

Science, New Series, Vol. 114, No. 2964, Oct. 19, 1951

Previous Issue: New Series, Vol. 114, No. 2963, Oct. 12, 1951
Next Issue: New Series, Vol. 114, No. 2965, Oct. 26, 1951

Front Matter (1 p.)
AAPG Research, pp. 3a

Edward A. Koester

The Stability of the World Strontium Cycle, pp. 407-411

Howard T. Odum

Technical Papers

Anomalous Thermal Behavior of Salivary Apoerythein Activity, p. 412

Ernest Beerstecher; Eleanor J. Edmonds

Formation of α -Keto Acids from α -Amino Acids by the Action of Free Radicals in Aqueous Solution, pp. 412-413

G. R. A. Johnson; George Scholes; Joseph Weiss

The Adsorption of Manganese by Algal Polysaccharides, pp. 413-414

Arthur L. Pollard; Peter Byrd Smith

The Recovery of Preformed Thrombin from Circulating Plasma, pp. 414-416

L. A. Sternberger; Frank Maltaner

Reduction of Carbon Dioxide in Aqueous Solutions by Ionizing Radiation, pp. 416-418

W. M. Garrison; D. C. Morrison; J. G. Hamilton; A. A. Benson; M. Calvin

Fungus Fruiting in Submerged Culture, pp. 418-419

Carl W. Bretzloff

The Rate of Mutation of the Gene Responsible for Retinoblastoma in Man, pp. 419-422

James V. Neel; Harold F. Falls

Cross Resistance of Streptococci to Five Streptomyces Antibiotics, pp. 422-423

Horace M. Gezon; Dorcas M. Fasan

Comments and Communications

Cult or Science?, p. 424

George A. Fink

(Potentiometric) Measurements in (Some) Colloidal Systems, pp. 424-425

Karol J. Mysels

Book Reviews

----------------, pp. 425-426

Propagation of Short Radio Waves

Donald E. Kerr

Review author[s]: E. L. Ginzton

----------------, p. 426

Fossil Mammals of Africa: The Miocene Hominoidea of East Africa, No. 1. W. E. Le Gros Clark and L. S. B. Leakey

Review author[s]: Horace E. Wood

News and Notes, pp. 427-430

Previous Issue: New Series, Vol. 114, No. 2963, Oct. 12, 1951
Next Issue: New Series, Vol. 114, No. 2965, Oct. 26, 1951

Science, New Series, Vol. 114, No. 2965, Oct. 26, 1951

Previous Issue: New Series, Vol. 114, No. 2964, Oct. 19, 1951
Next Issue: New Series, Vol. 114, No. 2966, Nov. 2, 1951

Front Matter (1 p.)
Primary Publication, pp. 3a

Eugene W. Scott

Distance as a Factor in the Development of Attraction Fields between Growing Tissues in Culture, pp. 431-432

Allan A. Katzberg

Harold Heath, Naturalist: 1868--51, pp. 433-434

Edwin G. Conklin

Technical Papers

A Possible Connection between Certain Metamorphic Phenomena and Anomalies in the Earth's Magnetic Field, pp. 434-435

John D. Weaver

The Action of Thrombin on Fibrinogen, pp. 435-436

K. Laki

The Radiation Dose-Response Curve and Bacterial Mutations, pp. 436-437

William E. Jordan; Roy B. Mefferd; Orville Wyss

Electrophoretic Comparison of the Serum Proteins of Normal and Diethyl-stilbestrol-Treated Cockerels, pp. 437-438

R. E. Clegg; P. E. Sanford; R. E. Hein; A. C. Andrews; J. S. Hughes; C. D. Mueller

Carbon Dioxide and Root Hair Development in Anacharis (Elodea), pp. 438-439

Hugh M. Dale

The Inhibitory Effects of Sorbose on Fungi H. L. Barnett and V. G. Lilly, pp. 439-440

Rapid Acclimatization of Insects to Anoxia, with Special Reference to the Housefly, pp. 440-441

F. W. Stemler; W. A. Hiestand

The Antihypertensive Influence of Certain Sulfhydryl Compounds, pp. 441-443

Henry A. Schroeder

The Distillation of Lithium Metal, pp. 443-444

Leo F. Epstein; W. H. Howland

An Instrument for Dynamic Vital Capacity Measurements, pp. 444-446

Edward A. Gaensler

Comments and Communications

The Search for Truth Versus Bigotry, p. 447

Walter C. Kraatz

Hemolytic and Antihemolytic Substances in Guinea Pig Liver, pp. 447-448

David B. Tyler

The Decarboxylation Reaction, pp. 448-449

Richard H. Wiley

Zoological Nomenclature: Notice of Proposed Suspension of Rules in Certain Cases for Avoidance of Confusion and the Validation of Current Nomenclatorial Practice (A. (n.s.) 9), p. 449

Francis Hemming

Mathematicians and the California Oath, pp. 449-450

E. G. Begle

Scientific Book Register, p. 450
News and Notes, pp. 451-454

Previous Issue: New Series, Vol. 114, No. 2964, Oct. 19, 1951
Next Issue: New Series, Vol. 114, No. 2966, Nov. 2, 1951

Science, New Series, Vol. 114, No. 2966, Nov. 2, 1951

Previous Issue: New Series, Vol. 114, No. 2965, Oct. 26, 1951
Next Issue: New Series, Vol. 114, No. 2967, Nov. 9, 1951

Front Matter (1 p.)
Catalysis, pp. 3a

Adalbert Farkas

Federal Recruitment of Junior Engineers, pp. 455-458

George P. Bush; Lowell H. Hattery

Technical Papers

Determination of Vitamin B12 with a Mutant Strain of Escherichia coli, pp. 459-460

Paul R. Burkholder

The Reversible Depolymerization of Fibrin, p. 460

Robert F. Steiner

The Wave-Frequency Dependence of the Duration of Radar-Type Echoes from Meteor Trails, pp. 460-462

V. C. Pineo; T. N. Gautier

Demineralization of Hard Tissues, pp. 462-463

F. L. Hahn; Fermin Reygadas

The Detection and Isolation of Naturally Occurring Strains of Tobacco Mosaic Virus by Electrophoresis, pp. 463-465

S. J. Singer; J. G. Bald; S. G. Wildman; R. D. Owen

Response of Meristems of Seedlings to Benzene Hexachloride Used as a Seed Protectant, p. 466

John E. Sass

The Inhibition of Hematopoietic Action of Cobalt by Ethylenediamine Tetracetic Acid (EDTA), pp. 466-467

George P. Child

Device for Stirring Liquids under Reduced Pressure in the Absence of Air and Mercury, pp. 467-468

Lawrence J. Heidt; Gerald George Palmer

Comments and Communications

Geology is in the Elementary Schools, pp. 468-469

Herbert S. Zim

Mail for Indonesia, p. 469

E. J. Slijper; G. Broersma

An Error Has Crept in, p. 469

Sumner Zacks

Book Reviews

----------------, p. 470

Ultrasonics

P. Vigoureux

Review author[s]: Charles Kittel

----------------, p. 470

Life in a Mexican Village: Tepoztlán Restudied

Oscar Lewis

Review author[s]: Juan Comas

Scientific Book Register, p. 471

Association Affairs

AAAS Policy, pp. 471-472

Warren Weaver

News and Notes, pp. 473-476

Previous Issue: New Series, Vol. 114, No. 2965, Oct. 26, 1951
Next Issue: New Series, Vol. 114, No. 2967, Nov. 9, 1951