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Science, New Series, Vol. 112, No. 2899, Jul. 21, 1950


Previous Issue: New Series, Vol. 112, No. 2898, Jul. 14, 1950
Next Issue: New Series, Vol. 112, No. 2900, Jul. 28, 1950


Physics Research at T.R.E., pp. 71-73
R. A. Smith

William Jackson Humphreys, pp. 74-75
S. A. Mitchell; Edgar W. Woolard


Technical Papers
A Simple Micromanipulator, pp. 76-77
L. J. Manhoff; Mychyle W. Johnson
A New Streptomycin, pp. 77-78
Robert G. Benedict; Frank H. Stodola; Odette L. Shotwell; Anne Marie Borud; Lloyd A. Lindenfelser
The Relation in Man between Cholesterol Levels in the Diet and in the Blood, pp. 79-81
Ancel Keys
Effect of Density and Average Atomic Number of the Medium on the Counting Yield of Beta and Gamma Radiation in a Solution-Type Geiger Counter, pp. 81-84
Robert Sieh-Hsuan Chiang; John E. Willard
The Curarelike Effect of Thiamine Hydrochloride Solution on Vagal Inhibition of the Frog Heart, p. 84
C. G. Kadner; W. I. Dean; D. F. Chambers; R. G. Poliquin
On the Existence of Bonds between Ossein and Inorganic Bone Fraction, pp. 84-86
Antonio Ascenzi
Brucella Ring Test Antigen Prepared by Reduction of a Tetrazolium Salt, p. 86
Ronald M. Wood
Protection of Mice against X-Radiation by Thiourea, pp. 86-87
G. Limperos; W. A. Mosher
Fluorescence of Mixtures of Arterenol, Epinephrine, and Phosphate, pp. 88-89
J. H. Heller; R. B. Setlow; E. Mylon
Biotin Deficiency as the Causative Agent of Induced Cryptorchidism in Albino Rats, p. 89
William K. Manning


Comments and Communications
The Civil Liberties of Scientists Report, p. 90
Maurice B. Visscher
On Political Oaths and Affidavits, pp. 90-91
Harry Grundfest
The Toxicity of Ammonia, p. 91
Y. C. Ting
Hydrostatic Pressure Reversal of Narcosis in Tadpoles, pp. 91-92
Frank H. Johnson; Elizabeth A. Flagler
Erratum, p. 92
E. S. Rittner
Pancreatic Changes after Injection of Intermediary Fat Metabolites, p. 92
M. C. Nath; H. D. Brahmachari; A. Gopalkrishna
The Donora Episode--A Reply to Clarence A. Mills, pp. 92-93
Leslie Silverman; Philip Drinker
Dr. Mills' Rejoinder, pp. 93-94
Clarence A. Mills
Proposed Uniform Endings for Names of Higher Categories in Zoological Systematics, p. 94
H. B. Stenzel


Book Reviews
----------------, p. 95
Classical Mechanics
Herbert Goldstein
Review author[s]: S. L. Quimby
----------------, pp. 95-96
Cold Spring Harbor Symposia on Quantitative Biology: Amino Acids and Proteins
Review author[s]: H. B. Vickery
----------------, p. 96
Advances in Electronics
L. Marton
Review author[s]: Karl Lark-Horovitz


Scientific Book Register, p. 96
News and Notes, pp. 97-100

Previous Issue: New Series, Vol. 112, No. 2898, Jul. 14, 1950
Next Issue: New Series, Vol. 112, No. 2900, Jul. 28, 1950



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