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Previous Issue: New Series, Vol. 73, No. 1897, May 8, 1931
Next Issue: New Series, Vol. 73, No. 1899, May 22, 1931
Front Matter (4 pp.)
The Union of American Biological Societies and Biological Abstracts
- The Washington Conference of March 7, 1931, pp. 509-512
- W. C. Curtis
- Biological Abstracts, pp. 512-516
- J. R. Schramm
- The Union and Biological Abstracts, pp. 517-518
- C. E. McClung
The American Association for the Advancement of Science
- Preliminary Announcement of the Pasadena Meeting, pp. 518-520
- Charles F. Roos
Scientific Events
- Geological Surveys in Alaska, p. 521
- Economic Conference for Engineers of the Stevens Institute of Technology, pp. 521-522
- The Ecological Society of America, p. 522
- The Centenary Meeting of the British Association for the Advancement of Science, pp. 522-523
Scientific Notes and News, pp. 523-526
Discussion
- Undertow and Rip Tides, pp. 526-527
- W. M. Davis
- New Mastodon Finds in European Turkey, pp. 527-528
- George D. Hubbard
- Vegetative Propagation in the Missouri Gourd, p. 528
- N. F. Petersen
- Meiosis in Hypericum punctatum lam, pp. 528-529
- Carl S. Hoar
- Softening Tissues, p. 529
- A. B. Couch
Scientific Apparatus and Laboratory Methods
- Use of an Improved Null Instrument for Glass Electrode Or Other High Resistance Circuits, pp. 529-530
- Samuel E. Hill
- A Tilting Stopcock, p. 530
- P. Lecomte Du Noüy
Special Articles
- A Mottled-Eyed Drosophila, pp. 530-531
- J. T. Patterson; T. S. Painter
- The Effects of X-Rays on the Growth of Wheat Seedlings, pp. 531-533
- Ware Cattell
- Respiration Studies on Azotobacter under Controlled Conditions, pp. 533-534
- J. M. Fife
The National Academy of Sciences. II, pp. 534-538
Books Received, p. 538
Science News, pp. 10a+12a+14a
Previous Issue: New Series, Vol. 73, No. 1897, May 8, 1931
Next Issue: New Series, Vol. 73, No. 1899, May 22, 1931