326 BIBLIOGRAPHY AND CARTOGRAPHY

DAVIS, W. M. The Catoctin Belt of Maryland and Virginia.

Science, n. s. vol. ii, 1895, pp. 97-98.

Short notes on area based on others' work, especially that of Keith. Criticises
Keith's use of the term " base level."

DAY, WM. C. Stone.

16th Ann. Rept. U. S. Geol. Surv., 1894-95, Washington, 1895, part iv.

Granite, p. 459; marble, p. 4G7; sandstone, p. 487; limestone, p. 507; slate, p. 478.

GANE, HENRY STEWART. A Contribution to the Neocene Corals of
the United States.

Johns Hopkins Univ. Cir., No. 121, vol. xv, 1895, pp. 8-10.
Describes many Neocene corals.

GANNETT, HENRY. A Dictionary of Geographic Positions.

Bull. U. S. Geol. Surv. No. 123, 1895, pp. 72-74.

House Misc. Doc., 54th Cong., 1st sess., vol. —, No. 311.

Enumerates stations established in Maryland, giving latitude and longitude.

KEMP, JAMES. The Ore Deposits of the United States. 8vo,
343 pp. New York, 1895.

Maryland, pp. 91, 104, 291, 303.

KEYES, C. R. The Origin and Relations of Central Maryland
Granites (with an introduction by G. H. Williams).

15th Ann. Rept. U. S. Geol. Surv., 1893-94, Washington, 1895, pp. 685-740,
with 21 plates.

The author shows that the granites are eruptive and that certain gneisses are
squeezed granites and that both epidote and muscovite are primary constituents of the
granites.

———— Secular Decay of Granitic Rocks.

Proc. Iowa Acad. Sci., vol. ii, Des Moines, 1895, pp. 27-31.

A paper based on a study of Maryland and Missouri granite areas.

———— Acidic Eruptives of North Eastern Pennsylvania.

Amer. Geol., vol. xv, 1895, pp. 39-46.

Additional observations on Epidote in the Port Deposit Crystalline and Metamor-
phics and on Zonal feldspars in same. Also notes on eastward extension of Crystalline
boundary.

MERRILL, G. P. Notes on Asbestos and Asbestiform Minerals.
Proc. U. S. Nat. Museum, vol. xviii, Washington, 1895, pp. 281-292.
Describes the asbestos from Alberton, Parkton and Pylesvllle, giving analyses and
showing the first to be anthophyllite.

———— The formation of Sandstone Concretions.

Proc. U. S. Nat. Mus., vol. xvii, 1895, pp. 87-89, plate.
Description of concretions from Washington reservoir.