Science, Vol. 2, No. 61, Aug. 27, 1881

Previous Issue: Vol. 2, No. 60, Aug. 20, 1881
Next Issue: Vol. 2, No. 62, Sep. 3, 1881

Front Matter (4 pp.)
The Cincinnati Meeting of the American Association for the Advancement of Science, pp. 401-404
Report on the Geology and Resources of the Black Hills of Dakota., pp. 404-405

Henry Newton; Walter P. Jenney; L. P. Gratacap

The Great Primordial Force, pp. 405-409

Henry Raymond Rogers

The Tidal Evolution of the Moon, pp. 409-410
Mr. Darwin on Dr. Hahn's Discovery of Fossil Organisms in Meteorites, p. 410
An Afternoon on Passaic River, pp. 410-411
Selenographical, p. 411

Books Received

----------------, p. 411

Sea Mosses. A Collector's Guide and an Introduction to the Study of Marine Algæ.

A. B. Hervey

Notes, pp. 411-412
Sun Spots, p. 412
Meteorological Report for New York City for the Week Ending Aug. 20, 1881, p. 412

Daniel Draper

Back Matter (4 pp.)

Previous Issue: Vol. 2, No. 60, Aug. 20, 1881
Next Issue: Vol. 2, No. 62, Sep. 3, 1881