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Previous Issue: Vol. 21, No. 519, Jan. 13, 1893
Next Issue: Vol. 21, No. 521, Jan. 27, 1893
Gravel Man and Palæolithic Culture; a Preliminary Word, pp. 29-30
- W. H. Holmes
The Nest of the Trap-Door Spider, p. 30
- D. Cleveland
Balances of the Peruvians and Mexicans, p. 30
- Walter Hough
An Interesting Sensory Organ in Certain Plant Lice, p. 31
- John B. Smith
The Indiana Academy of Science, pp. 31-32
Life-Saving, pp. 32-33
- Delos Fall
Notes and News, p. 33
[Editorial Notes], p. 34
The American Psychological Association, pp. 34-35
Association of American Anatomists, p. 35
Notes on the Occurrenge of Rubellite and Lepidolite in Southern California, pp. 35-36
- Harold W. Fairbanks
Letters to the Editor
- Snake Story, pp. 36-37
- W. A. Kellerman
- Geographical Variation in Birds, p. 37
- Hubert Lyman Clark
- Pseudoaurora Not Shadows, p. 37
- P. L. Hatch
- Natural Selection at Fault, pp. 37-38
- J. W. Slater
- Speed of Flight of Birds, p. 38
- Hubert Lyman Clark
- Bowser's Trigonometry, p. 38
- H. L. Hodgkins
- Humming-Bird's Food, pp. 38-39
- Alvah A. Eaton
- A Peculiar Fire, p. 39
- G. D. Shepardson
- Electrical Phenomena on Mountains, p. 39
- Geo. Clulow
- Maya Codices, p. 39
- Cyrus Thomas
Book-Reviews
- ----------------, pp. 39-40
- Experimental Evolution
- Henry de Varigny
- ----------------, p. 40
- Text-Book of Elementary Biology
- H. J. Campbell
- ----------------, pp. 40-41
- Physics. Advanced Course
- George F. Barker
Among the Publishers, p. 41
Back Matter (3 pp.)
Previous Issue: Vol. 21, No. 519, Jan. 13, 1893
Next Issue: Vol. 21, No. 521, Jan. 27, 1893