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Previous Issue: New Series, Vol. 49, No. 1253, Jan. 3, 1919
Next Issue: New Series, Vol. 49, No. 1255, Jan. 17, 1919
Front Matter (1 p.)
The American Association for the Advancement of Science
- The Need of Conservation of Our Vital and Natural Resources as Emphasized by the Lessons of the War, pp. 27-31
- Henry Sturgis Drinker
Chemistry and Medicine: A Tribute to the Memory of John Harper Long, pp. 31-38
- Julius Stieglitz
Educational Events
- Biological Surveys of States by the United States Department of Agriculture, p. 38
- The Census Bureau, pp. 38-39
- The Bureau of Standards, pp. 39-40
Scientific Notes and News, pp. 40-43
University and Educational News, p. 43
Discussion and Correspondence
- Two New Instances of Polyembryony among the Encyrtidæ, pp. 43-44
- L. O. Howard
- Foundations of Mechanics, p. 44
- Paul J. Fox
- Tropical Enervation, pp. 44-46
- Vaughan MacCaughey
Scientific Books
- ----------------, p. 46
- Stoichiometry
- Sydney Young
- Review author[s]: J. Livingston R. Morgan
The Proceedings of the National Academy of Sciences, pp. 46-48
- Edwin Bidwell Wilson
Special Articles
- On the Nature of the Pigmentation Changes Following Hypophysectomy in the Frog Larva, pp. 48-50
- Wayne J. Atwell
The Paleontological Society, pp. 50-51
- R. S. Bassler
The American Psychological Association, pp. 51-52
- Herbert Sidney Langfeld
The Optical Society of America, p. 52
- P. G. Nutting
Back Matter (1 p.)
Previous Issue: New Series, Vol. 49, No. 1253, Jan. 3, 1919
Next Issue: New Series, Vol. 49, No. 1255, Jan. 17, 1919