268 BIBLIOGRAPHY AND CARTOGRAPHY

1857.

ANSTED, D. T. On Some Remarkable Mineral Veins. 2. On some
Copper lodes near Sykesville in Maryland.

Quart. Jour. Geol. Soc. London, vol. xiii, 1857, pp. 240-254.

Describes "with sections the Springfield mid Carroll mines, where the ore is first
iron ore and then Iron pyrites and lastly copper pyrites. Mentions deposit near Point
of Rocks, which he believes to be the top of another copper pyrites body (pp. 242-245).
Mine visited in 1854.

GEXTH, FREDERICK A. Contributions to Mineralogy.
Amer. Jour. Sci., 2nd ser., vol. xxiii, 1857, pp. 415-427.

Pages 418-419. Descriptions of Carrolllte, from Patapsco and Springfield (Carroll
County) mines and of Siegenlte from Mineral Hill, Md., with analyses and physical
properties.

HALL, JAMES. Observations on the Cretaceous Strata of the United
States with reference to the Relative Position of the Fossils collected
by the Boundary Commission.

Amer. Jour. Sci., 2nd ser., vol. xxiv, 1857, pp. 72-86.

A comprehensive paper attempting a correlation of the Cretaceous of the Atlantic
Coast, including New Jersey and Delaware, with that of the west and southwest. See
also U. S. and Mexico Boundary Survey under Emory.

1858.

DIEFFENBACH, OTTO. Bemerkungen uber den Kupferbergbau in
den Vereinigten Staaten von Nord-Amerika.

Berg- und Hiitt. Zeit, 1858, pp. 47-48, 66-68, 75-76 (not seen).

HIGGINS, JAMES. The Sixth Agricultural Report of James Higgins,
State Chemist, to the House of Delegates of the State of Maryland.
8vo. 96 pp. Annapolis, 1858. With an appendix " On the Ana-
lysis of Soils " by Chas. Beckell. Order of House and Senate.

Md. Sen. Doc. [E]. Md. House Doc. [D].

Also State Chemist's Report, n. d. (1858), 8vo, 96, xxii pp.

Includes a very short account of the geology of Carroll County

MARCOU, J. Geology of North America. 4to. Zurich, 1858.

A collection and republicatlon of several papers, maps and figures dealing with
American Geology.

ROGERS, H. D. The Geology of Pennsylvania. 2 vols. (vol. II
in two parts) and maps. 4to. Phila. 1858.

This work contains frequent reference to the Maryland extension of formations
studied in Pennsylvania, besides giving the typical sections, terms, fossils, etc.