MARYLAND GEOLOGICAL SURVEY 289

LESLEY, J. P. The Geology of Chester County, Pennsylvania.
Eept. 2nd Geol. Surv. of Pa. C-4, Harrisburg, 1883.

Deals with the geological formations along the border of the state and their exten-
sion Into Maryland.

McGEE, W J (Note on buried forest of Washington, I). C.)

Amer. Nat., vol. ii, 1883, p. 724.

Tells of the finding of remains of a prequaternary forest near Washington.

SMOCK, J. C. The Useful Minerals of the United States.

Mineral resources U. S., 1882, Washington, 1883, pp. 664, 690-693.

Gives list of minerals, their localities and the present state of workings in Maryland.

SWANK, J. M. Iron Ore and its Products.
Mineral Kesources U. S., 1882, Washington, 1883, pp. 128-137.
Statistics showing marked increase in the output from Maryland in the years fol-
lowing 1876.

UHLER, P. R. Geology of the Surface Features of the Baltimore
Area.

Johns Hopkins Univ. Cir. No. 21, vol. ii, 1883, pp. 52-53.
(Abst.) Science, vol. i, 1883, pp. 75-76, 277.

Describes the general features of the area and considers Archean to have been meta-
morphosed during Jurassic Period.

WILBUR, F. A. Marls.

Mineral Resources U. S., 1882, Washington, 1883, p. 522.

Mentions belt of Cretaceous and Tertiary marls extending across the state.

———— Clay.

Mineral Resources U. S., 1882, Washington, 1883, pp. 465-475.
Mentions fire-clay found at Mt. Savage, Allegany county, with analyses (p. 408);
also pottery clay or kaolin in Harford and Cecil counties (p. 470).

WILLIAMS, ALBERT, JR. (Editor). Building Stones.
Mineral Resources U. S., 1882, Washington, 1883, pp. 451-452.
Statistics of the stone Industry in Maryland for 1882.

1884.
ADAMS, W. H. The Pyrites Deposits of Louisa County, Va.

Trans. Amer. Inst. Min. Eng., vol. xii, 1884, pp. 527-535.
Bare mention of the pyrites deposits of Cecil county, Md.

ANON. Mining Notes.

Eng. and Min. Jour., vol. xxxviii, 1884, New York, 1884.
Granite quarries at Lapidum, Harford county, p. 9.
Alleged discovery of zinc ore in Anne Arundel county, p. 400.