318 BIBLIOGRAPHY AND CARTOGRAPHY

DAY, D. T. (Editor). Mineral Paints.

Mineral Resources U. S., 1892, Washington, 1893, pp. 815-820.

Statistics on ocher (816), metallic paints (818).

DAY, WM. C. Stone.

Mineral Resources U. S., 1891, Washington, 1893.

Statistics of the granite industry for 1891, pp. 457, 459; sandstone, pp. 461, 462; lime-
stone, pp. 464, 466; marble, pp. 468, 469; serpentine, p. 469; slate, pp. 472, 473.

———— Stone.

Mineral Resources U. S., 1892, Washington, 1893.

Statistics of granite Industry for 1892, pp. 706-7; marble, p. 709; sandstone, p. 710;
slate, p. 710; limestone, p. 711.

EMMONS, S. F. Progress of the Precious metal Industry in the
United States since 1880.

Mineral Resources U. S., 1892, Washington, 1893, pp. 46-94.

The " Appalachian States " especially considered, pp. 86-88, and the production of
gold and sllTer since 1880 is also given.

GANNETT, HENRY. The Average Elevation of the United States.

13th Ann. Rept. U. S. Geol. Surv., 1891-92, part ii, Washington, 1893, pp.
283-289.

Statistics on areal distribution of different altitudes within the state.

GEIKIE, A. Text Book of Geology. 3rd edit. 8vo. 1147 pp.
London: Macmillan Co., 1893.

Maryland, pp. 735, 1002. See also earlier editions.

GLENN, WM. Chrome.

In Maryland, its Resources, Industries and Institutions, pp. 120-122, Balti-
more, 1893.

An historical discussion of the industry in Maryland.

GRANT, ULYSSES SHERMAN. Note on a quartz-bearing gabbro in
Maryland.

Johns Hopkins Univ. Cir. No. 103, vol. xii, 1893, pp. 47-49.

(Rev.) Amer. Nat., vol. xxvii, 1893, p. 383.

Petrographic description of rocks from several Maryland localities.

HARRIS, G. D. Republication of Conrad's Fossil Shells of the Ter-
tiary Formations of North America. 8vo. 121 pp. 20 plates.
Washington, D. C., 1893.

Contains an historical introduction by Harris, giving the dates of publication of the
various numbers of Conrad's papers. See Conrad, 1832-1835.

———— The Tertiary Geology of Calvert Cliffs, Maryland.

Amer. Jour. Sci., 3rd ser., vol. xlv, 1893, pp. 21-31, map.