Science, New Series, Vol. 109, No. 2819, Jan. 7, 1949

Previous Issue: New Series, Vol. 108, No. 2818, Dec. 31, 1948
Next Issue: New Series, Vol. 109, No. 2820, Jan. 14, 1949

Volume Information (2 pp.)
Elvin Charles Stakman: President of AAAS, 1949, pp. 1-2

Helen Hart

Research and the Development of Atomic Energy, pp. 2-7

Robert F. Bacher

Preliminary Investigations of Chromosomes and Genes with the Electron Microscope, pp. 8-10+22

Daniel C. Pease; Richard F. Baker

Technical Papers

Effect of Absorber Position on Counting Rate of Collimated and Uncollimated Beta and Gamma Radiation, pp. 11-12

Francis Johnston; John E. Willard

Oxidation of Parenterally Administered C14-Labeled Tripalmitin Emulsions, p. 13

S. R. Lerner; I. L. Chaikoff; C. Entenman; W. G. Dauben

Life Cycle of Postharmostomum laruei McIntosh 1934 (Trematoda: Brachylaemidae), pp. 13-14

Martin J. Ulmer

Distribution of Free Amino Acids in Mouse Epidermis in Various Phases of Growth as Determined by Paper Partition Chromatography, pp. 14-16

Eugene Roberts; Garson H. Tishkoff

Blocking Action of Tetraethylammonium on Axon Reflexes in the Human Skin, p. 16

Henry Janowitz; M. I. Grossman

Further Consideration of a Suggested Simple Laboratory Test for Poliomyelitis Virus, p. 17

Pierre R. Lépine; Alex J. Steigman; Albert B. Sabin

Comments and Communications

A Note on ``Why Vegetation on Watersheds?'', p. 18

W. E. Bullard

Antigen Films and Long-Range Forces, p. 18

John Iball

Antigen Films and Long-Range Forces, p. 18

John Iball

Precedence of Modern Plant Names over Names Based on Fossils?, pp. 18-19

Otto Haas

Precedence of Modern Plant Names over Names Based on Fossils?, pp. 18-19

Otto Haas

The Human Engineering Seminar at New York University, p. 19

Lawrence Edwin Abt

In Memoriam

Richard Chace Tolman: 1881-1948, pp. 20-21

Vannevar Bush

Book Reviews

----------------, p. 21

Cancer, I, Hérédité, hormones, substances cancérigenès

J. Maisin

Review author[s]: F. Duran-Reynals

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

Outlines of Physical Chemistry

Farrington Daniels

Review author[s]: Raymond M. Fuoss

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

North American Trees (Exclusive of Mexico and Tropical United States)

Richard J. Preston

Review author[s]: M. A. Huberman

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

Previous Issue: New Series, Vol. 108, No. 2818, Dec. 31, 1948
Next Issue: New Series, Vol. 109, No. 2820, Jan. 14, 1949