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Previous Issue: Vol. 21, No. 518, Jan. 6, 1893
Next Issue: Vol. 21, No. 520, Jan. 20, 1893
The Work of the U. S. Geological Survey, pp. 15-17
- J. W. Powell
The Geological Society of America, pp. 17-18
Seventh Annual Meeting of the Iowa Academy of Science, pp. 18-19
Unusual Abundance of the Grosbeak in Eastern Massachusetts, p. 19
- J. H. Bowles
Notes and News, p. 19
[Editorial Notes], p. 20
Recent Progress in American Horticulture, pp. 20-23
- L. H. Bailey
The Importance of "Next-to-Nothing" in Chemistry, pp. 23-24
- W. H. Pendlebury
Bread-Fruit Trees in North America, pp. 24-25
- F. H. Knowlton
Notes on Mars and Meteors, p. 25
- E. Miller
Letters to the Editor
- Breathing Wells, p. 25
- Goodwin D. Swezey
- Hybridism in Genus Colaptes, p. 25
- Alvah A. Eaton
- How Shall I Study Ants?, p. 25
- Dwight Goddard
Book-Reviews
- ----------------, pp. 26-27
- Waterdale Researches; or, Fresh Light on Dynamic Action
- Waterdale
- Cosmical Evolution: A New Theory of the Mechanism of Nature
- E. McLennan
- ----------------, p. 27
- Dynamics of Rotation
- A. M. Worthington
- ----------------, p. 27
- Mechanical Drawing
- C. W. McCord
Back Matter (3 pp.)
Previous Issue: Vol. 21, No. 518, Jan. 6, 1893
Next Issue: Vol. 21, No. 520, Jan. 20, 1893