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Science, New Series, Vol. 85, No. 2209, Apr. 30, 1937


Previous Issue: New Series, Vol. 85, No. 2208, Apr. 23, 1937
Next Issue: New Series, Vol. 85, No. 2210, May 7, 1937


Front Matter (2 pp.)
The Philosophy of Physics, pp. 413-419
W. V. Houston

The Ursi Programs of Short-Wave Station W1xal, pp. 419-421
A. E. Kennelly


Scientific Events
Principal Addresses at the Denver Meeting of the American Association for the Advancement of Science, p. 421
F. R. Moulton
The American Chemical Society, pp. 421-422
Symposium on Theoretical Physics at the University of Michigan, p. 422
The Finney-Howell Research Foundation, pp. 422-423
The American Philosophical Society, p. 423
Recent Deaths, p. 423


Scientific Notes and News, pp. 423-426


Discussion
Sedimentation in a Small Artificial Lake, pp. 426-427
R. H. Mitchell; G. Robert Hall
A New Color Type in Cabbage, pp. 427-428
Roy Magruder
Magnesium Sulfate--A New Insecticide, p. 428
Hubert W. Frings; Mable S. Frings
Anatomical Nomenclature, p. 428
George W. Corner


Special Articles
Phosphorescence of Cells and Cell Products, pp. 428-429
A. C. Giese; P. A. Leighton
The Chemoreceptors of Certain Dipterous Larvae, pp. 430-431
John H. Welsh
The Discovery and Identification of a New Purine Alkaloid in Tea, p. 431
Treat B. Johnson


Scientific Apparatus and Laboratory Methods
A Condenser Discharge Stimulator for Physiological Purposes, pp. 431-432
Oscar A. M. Wyss
A Method for Observing the Lower Surface of Small Objects, p. 432
Ralph J. Bailey


Books Received, p. 432
Science News, pp. 8a-9a
Back Matter (1 p.)

Previous Issue: New Series, Vol. 85, No. 2208, Apr. 23, 1937
Next Issue: New Series, Vol. 85, No. 2210, May 7, 1937



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