240 BIBLIOGRAPHY AND CARTOGRAPHY

ROBINSON, SAMUEL. A Catalogue of American Minerals, with their
localities. Boston, 1825.

Pages 195-201 are devoted to minerals from Maryland. Retlnasphaltum is men-
tioned in the Appendix, p. 302.

SPARKS, JARED. Baltimore.

N. A. Review, vol. xx, 1825, pp. 99-138.

The article contains a discussion on the intercourse of Baltimore with the western
country by means of canals and turnpikes. Reference to iron ore in abundance, copper
works with 600,000 pounds capacity; copper sulphuret mines in Frederick County, the
source of copper for Capitol dome at Washington (p. 130).

TROOST, G. Description and Chemical Analyses of the 'Retinas-
phalt discovered at Cape Sable, Magothy River, Anne Arundel
County, Md. (Read Dec. 19, 1823.)

Trans- Amer. Phil. Soc., n. s. vol. ii,.1825, pp. 110-115.

Describes retinasphalt, earthy retinasphalt and amber occurring intermixed with
wood and pyrites at Cape Sable.

VAN RENSSELAER, JER. Lectures on Geology; being outlines of
the science, delivered in the New York Atheneum in the year 1825.
8vo. pp. 358. New York, 1825.

Only general references to Maryland.

1826.

BERNARD, S., POUSSIN, WM. TELL, HOWARD, W. Report of the
Board of Internal Improvement.
See Merrill, 1874.

DEKAY, J. E. Anniversary Address on the Progress of the Natural
Sciences in the United States, delivered before the Lyceum of Natural
History of New York, Feb. 1826. New York, 1826.

Only general references to Maryland.

DUNLOP, J. Memoir on the Controversy between William Penn
and Lord Baltimore respecting the boundaries of Pennsylvania and
Maryland. 38 pp.

Mem. Penn. Hist. Soc., vol. i, 1826, pp. 159-196.

PIERCE, JAMES. Practical remarks on the shell marl region of the
eastern parts of Virginia and Maryland, and upon the bituminous
coal formations of Virginia and the contiguous region.

Amer. Jour. Sci., vol. xi, 1826, pp. 54-59.

Extracts from a letter; economic in character. Mentions exposures at Marlboro
and discusses the relative value of marls.