MARYLAND GEOLOGICAL SURVEY 241

1827.

BERNARD, S., and POUSSIN, W. T. Letter from the Postmaster Gen-
eral transmitting report of General Bernard on surveys of routes for
a Post Road from Baltimore to Philadelphia. Washington, 1827.

Gives a map and notes on the geological formations and soils along the different
routes.

DISBROW, LEVI. Notice of some recent experiments in boring for
fresh Water, and of a pamphlet on that subject.
Amer. Jour. Sci., vol. xii, 1827, pp. 136-143.
Gives sections passed through at Washington and Baltimore.

MORTON, S. G. Description of a new species of Ostrea; with some
Remarks on the O. convexa of Say. Read May 1, 1827.

Jour. Acad. Nat. Sci. Phila., vol. vi, 1827, pp. 50-51.

Describes and figures Ostrea falcata, from the Delaware and Chesapeake Canal near
St. George's.

1828.

ANON. First Annual Report of the Board of Engineers to the
Board of Directors of the B. & O. R. R. 43 pp. Map of route from
Baltimore to Ellicott's Mills.

Reviewed by Peter H. Cruse in N. A. Rev., vol. xxviii, 1829, pp. 166-1S6.

ANON. Report of the Engineers, on the Reconnaissance and Sur-
veys made in reference to the Baltimore and Ohio R. R. 8vo. 188
pp. 1828.

Reviewed by Peter H. Cruse in N. A. Rev., vol. xxviii, 1829, pp. 166-186.

CARPENTER, GEORGE W. On the Mineralogy of Chester County,
with an account of some of the Minerals of Delaware, Maryland and
other Localities.

Amer. Jour. Sci., vol. xiv, 1828, pp. 1-15.

Also published separately, 12mo, pp. 16, Phila., 1828 (Md. ref., p. 14).

Gives brief lists of minerals occurring near the Falls of North East Creek (Cecil
County) near Cooperstown (Harford County). Reference to the Magnesite of the Bare
Hills (Baltimore County) then employed in the manufacture of Epsom Salts. Includes
only schorl, actinolite, magnetite, talc, and mangesite (p. 13).

MORTON, S. G. Description of two new species of Fossil Shells of
the genus Scapphites and Crepidula: with some observations on the
Ferruginous Sand, Plastic Clay, and Upper Marine Formations of
the United States. (Read June 17, 1828.)

Jour. Acad. Nat. Sci. Phila., vol. vi, 1828, pp. 107-119.

Gives list of Maryland fossils from " Upper Marine Beds" and discusses the
European correlation.