MARYLAND GEOLOGICAL SURVEY 297

GOODE, G. BROWN. Presidential address. Beginnings of Natural
History in America.

Proc. Biol. Soc., Washington, vol. iii, 1886, pp. 35-105.
Gives account of early scientific explorations.

McGEE, W J Geological Formations underlying Washington
and Vicinity.

Rept. Health Officer of the District of Columbia for the year ending June
30, 1885, by Dr. S. Townsend, pp. 19-21, 23-35.

(Abst.) by author in Amer. Jour. Sci., 3rd ser., vol. xxxi, 1886, pp. 473-4.

Describes the composition and distribution of the Columbia and underlying Potomac
formations and something of the Crystalline rocks.

———— Geography and Topography of the head of Chesapeake Bay.
(Head to Amer. Assoc. Adv. Sci. 1886.)

(Abst.) Amer. Jour. Sci., 3 ser., vol. xxxii, 1886, p. 323.
Describes the drainage and topographic features.

PEALE, A. C. Lists and analyses of the mineral Springs of the
U. S.

Bull. U. S. Geol. Surv. No. 32, 1886, pp. 51-53.

House Misc. Doc., 49th Cong., 2nd sess., vol. viii, No. 164.

A number of springs are given in a tabulated list. These springs are not used as
much as formerly, and some reports of springs of this character do not mention Mary-
land in the list.

PRIME, FREDERICK, JR. The Coals of the United States.

Tenth Census, vol. xv, Mining Industries of the U. S., Washington, 1886.

Maryland references, p. 855, coal, 895-6, 935-946; copper, 978; zinc, 983, 985, 987-8.

PUMPELLY, R. (Editor). Directory of Mines and Metallurgical
Establishments East of the 100th Meridian.

Tenth Census, vol. xv, Mining Industries of the U. S., Washington, 1S86.
Maryland references, p. 855, coal, 895-6, 935-946; copper, 978; zinc, 983, 985, 087-8.

———— Geological and Geographical distribution of the Iron Ores
of the United States.

Tenth Census, vol. xv, Mining Industries of the U. S., Washington, 1886,
pp. 3-36.

Maps, sections. Maryland ores, classed as Cambrian. Silurian, Cretaceous, and
Quaternary.

SWANK, JAMES M. Twenty-one years of progress in the manu-
facture of Iron and Steel in the United States.

Mineral Resources U. S., 1885, Washington, 1886, pp. 180-195.
Gives statistics on pig iron, rails, rolled iron and steel in Maryland.