284 BIBLIOGRAPHY AND CARTOGRAPHY

RUSSELL, I. C. On the Physical History of the Triassic Formation
in New Jersey and Connecticut Valley.

Annals N. Y. Acad. Sci., vol. i, 1879, p. 79, also pp. 220-254.
Several references to particular Triassic areas in Maryland.

SCHARF, J. T. History of Maryland from the Earliest Period to
the Present Day. 3 vols., 4to, Baltimore, 1879.

Contains many references to the early maps, histories and Industries of the state.

1880.

BROWN, THOMAS. The Maryland Union Coal Company.
Eng. and Min. Jour., vol. xxx, 1880, p. 3.

Several facts on the size, character and extent of the coal veins in the property of
the company.

DANA, J. D. Manual of Geology. 3rd edit.

Maryland, pp. 236, 243, 419, 455, 490, 494-5.

FRAZER, PERSIFOR, JR. The Geology of Lancaster County, Pa.
Rept. 2nd Geol. Surv. Pa. CCC, Harrisburg, 1880, atlas.

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

JEFFRIES, W. W. Menaccanite and Talc from Maryland.
Proc. Acad. Nat. Sci., Phila., 1880, p. 292.

J. C. K. Maryland Mining Notes.

Eng. and Min. Jour., vol. xxix, 1880, p. 48.

Notes on iron and gold prospects from various parts of the state. Also reference,
p. 306, to gold found near Mr. Appold's estate on land owned by Mr. F. M. Hay;
assayed at $30 per ton.

LESLEY, J. P. On a slab of roofing slate covered with casts of
Buthotrephis flexuosa from the Peach Bottom Slate Quarries. (Read
Dec. 1879.)

Proc. Amer. Phil. Soc., vol. xviii, 1880, pp. 364-369.

This paper gives the history of the find, its determination by Lesquereux, analysis
of slate and remarks by Frazer.

———— A Hudson River fossil plant in the Roofing slate that is
associated with the chlorite slate and metamorphic limestone in Mary-
land, adjoining York and Lancaster Counties, Pennsylvania.

Amer. Jour. Sci., 3 ser., vol. xix, 1880, pp. 71-72.

Buthotrephis flexuosa (determined by Lesquereux) in the Peach Bottom slates, Silu-
rian age Inferred. Extract from a letter.

RIORDAN, O. Second Annual Report of Owen Riordan, Inspector
of Mines for Allegany and Garrett Counties. For year ending Dec.
1879. 8vo. 31 pp.

Md. House and Senate Doe., 1880 [J].