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Previous Issue: New Series, Vol. 73, No. 1903, Jun. 19, 1931
Next Issue: New Series, Vol. 74, No. 1905, Jul. 3, 1931
Front Matter (4 pp.)
The Functional Activity of Single Units in the Central Nervous System, pp. 685-692
- J. F. Fulton
A Recent Drift in Biological Thought, pp. 692-694
- Wm. A. Kepner
Scientific Events
- The British Non-Ferrous Metals Research Association, p. 694
- Research Reserves in the National Parks, pp. 694-695
- Summer Work of Members of the Division of Geology of Harvard University, p. 695
- The Dedication of Lakeside Hospital at Western Reserve University, pp. 695-696
- British Birthday Honors, p. 696
Scientific Notes and News, pp. 696-700
Discussion
- Evolution a Detail in the Dynamics of Populations, pp. 700-702
- W. H. Longley
- Necessity of Organic Matter for the Maintenance of an Available Supply of Phosphorus in the Soil, pp. 702-703
- A. H. Meyer
- Insects as Pollen Carriers, p. 703
- L. R. Waldron
- Awards for Scientific Research by the Congress, pp. 703-704
- Fred R. Jelliff
- New Technical Words, p. 704
- W. A. Dayton
Reports
- Twelfth Annual Meeting of the American Geophysical Union, pp. 705-707
- Jno. A. Fleming
Scientific Apparatus and Laboratory Methods
- A Simple Automatic Pressure Regulator for Filtration, pp. 707-709
- Einar Leifson
- Inexpensive Aerated Aquaria, p. 709
- J. Henry Walker
- Differential Filtration as a Means of Isolating Bacterium granulosis, pp. 709-710
- Ralph E. Knutti; Peter K. Olitsky; Joseph R. Tyler
Special Articles
- A Ration for the Production of Rickets in Chicks, pp. 710-711
- E. B. Hart; O. L. Kline; J. A. Keenan
- An Investigation of "Insight" in Rats, pp. 711-712
- H. C. Gilhousen
Books Received, p. 712
Science News, pp. 10a+12a+14a
Previous Issue: New Series, Vol. 73, No. 1903, Jun. 19, 1931
Next Issue: New Series, Vol. 74, No. 1905, Jul. 3, 1931