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Previous Issue: Vol. 20, No. 491, Jul. 1, 1892
Next Issue: Vol. 20, No. 493, Jul. 15, 1892
Diamonds in Meteorites, p. 15
- Oliver Whipple Huntington
The Number of Broods of the Imported Elm-Leaf Beetle, p. 16
- C. V. Riley
The Reptilian Rattle, pp. 16-17
- S. Garman
Opposition of Mars, pp. 17-18
- Edgar L. Larkin
Cross-Fertilizing and Hybridizing, p. 18
Notes and News, pp. 18-19
[Editorial Notes], p. 20
On the Uncertainty of Conclusions, pp. 20-25
- T. C. Mendenhall
Remarks upon the Graphic System of the Ancient Mayas, pp. 25-26
- Hilborne T. Cresson
Among the Publishers, p. 27
Back Matter (3 pp.)
Previous Issue: Vol. 20, No. 491, Jul. 1, 1892
Next Issue: Vol. 20, No. 493, Jul. 15, 1892