314 BIBLIOGRAPHY AND CARTOGRAPHY

FOOTE, A. E. A New Meteoric Iron from Garrett county, Mary-
land.

Amer. Jour. Sci., 3rd ser., vol. xliii, 1892, p. 64, plate i.
Proc. Acad. Nat. Sci., Phila., 1892, vol. xliii, p. 455.

The meteorite Is characterized by a high per cent, of cobalt, octahedral etching
and " Laphamite " markings.

HILGARD, EUGENE W. The Age and Origin of the Lafayette For-
mation.

Amer. Jour. Sci., 3rd ser., vol. xliii, 1892, pp. 389-402.

Thinks that McGee has carried the explanation and conditions characteristic
for the Atlantic coast into the area of the Mississippi embayment where the author
thinks " a materially different mode of development has occurred," p. 344.

JONES, J. H. Coal.

House Misc. Doc., 52nd Cong., 1st sess., vol. 1, pt. i, No. 340.
Eleventh Census, Eeport on Mineral Industries, 1892, pp. 345-422.
Maryland statistics, pp. 384-386.

KEITH, ARTHUR. The Geologic Structure of the Blue Ridge in
Maryland and Virginia.

Amer. Geol., vol. x, 1892, pp. 362-368.

Broadly considered, the region is an anticline, where an arch is crumpled into sev-
eral syncllnes and broken by faults till the resultant structure is quite complicated.

KENT, WM. Gold and Silver.

Mineral Resources U. S., 1889-90, Washington, 1892.

Production of gold (from Eleventh Census), p. 49.

LESLEY, J. P. A Summary description of the Geology of Pennsyl-
vania. 3 vol. Harrisburg, 1892.

Numerous references to formations passing southwards into Maryland.

NEWBURY, S. B. Cement.

Mineral Resources U. S., 1889-90, Washington, 1892.
Statistics on hydraulic cement from Maryland, p. 461.

PARKER, E. W. Coal.

Idem.

Coal statistics, pp. 146, 148, 170, 221-225. See also p. 155.

PEALE, A. C. Mineral Waters.

Idem.

Enumeration of the springs reported for the year, p. 528, with statistics, p. 522.

RICE, CLINTON. Maryland Mines.

Eng. and Min. Jour., vol. liii, 1892.

Short communication concerning the gold mine opened in Hyattsville and the closing
of those near Great Falls, p. 565.