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Science, New Series, Vol. 105, No. 2727, Apr. 4, 1947


Previous Issue: New Series, Vol. 105, No. 2726, Mar. 28, 1947
Next Issue: New Series, Vol. 105, No. 2728, Apr. 11, 1947


Front Matter (6 pp.)
Mechanism of the Invasiveness of Cancer, pp. 347-348
Dale Rex Coman

Artificial Radioactive Tracers: Applications to Chemistry and Medicine, pp. 349-354
Glenn T. Seaborg

News and Notes, pp. 355-359


Comments by Readers
The Announcement of the 6th International Congress of Experimental Cytology, p. 360
Sally Hughes-Schrader
Interesting Calculations of the Unequal Distribution of Diffusible Non-Electrolytes across a Membrane, p. 360
David I. Hitchcock
A Footnote to Henry K. Beecher's Interesting Article on ''Anesthesia's Second Power,'', p. 360
John F. Dashiell
The Article by Haley and Flesher, p. 360
Joseph F. Bicak


Technical Papers
Cinephotomicroscopy of Normal Blood Circulation in the Cheek Pouch of the Hamster, pp. 361-362
George P. Fulton; Ruby G. Jackson; Brenton R. Lutz
Vascular Changes in the Wings of Bats, pp. 362-363
Raymond B. Cowles
Carbon and Hydrogen in Rubber Hydrocarbon, pp. 363-364
Henry J. Wing
Variation among Lamb Carcasses in the B Vitamin Content of Meat, pp. 364-365
Sylvia Cover; Esther M. Dilsaver; Rene M. Hays
The Effects of Cytochrome C in Anoxia, pp. 365-366
I. Herbert Scheinberg; H. O. Michel
Effects of Ultraviolet Radiation on Visual Thresholds, p. 366
Ernst Wolf


In the Laboratory
Determination of World Plant Formations from Simple Climatic Data, pp. 367-368
L. R. Holdridge
Detection of Hypoglycemic Reactions in the Mouse Assay for Insulin, pp. 368-369
D. M. Young; A. H. Lewis
Apparatus for Mustard Gas Treatment, p. 369
J. G. Carr
Acetone-Desiccated Adult Tissues as a Source of Cell Growth-Promoting Extracts, pp. 369-370
E. Margoliash
Oral Administration of Small Doses of Liquids to Laboratory Animals, pp. 370-371
C. A. Cabell


Book Reviews
----------------, p. 372
Trace Elements in Plants and Animals
Walter Stiles
Review author[s]: Daniel I. Arnon
----------------, p. 372
Gall Midges of Economic Importance
H. F. Barnes
Review author[s]: James A. Hyslop

Previous Issue: New Series, Vol. 105, No. 2726, Mar. 28, 1947
Next Issue: New Series, Vol. 105, No. 2728, Apr. 11, 1947



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