278 BIBLIOGRAPHY AND CARTOGRAPHY

1874.

ANON. Final Reports of the Virginia Commissioners on the Mary-
land and Virginia Boundary to the Governor of Virginia. Richmond,
1874.

DUNLAP, THOS. (Editor). Wiley's American Iron Trade Manual.
New York, 1874.

A Directory giving furnaces and ores used, also a description of the Iron ores of
Maryland, p. 460.

HAGEN, H. A. On Amber in North America.

Proc. Boston Soc. Nat. Hist., vol. xvi, 1874, pp. 296-301.

Discusses Troost's paper (1821) on the Cape Sable locality and compares the various
sources of amber.

HALL, JAS. The Niagara and Lower Helderberg Groups; their
relations and geographical distribution in the United States.

Proc. Amer. Assoc. Adv. Sci., vol. xxiii, 1874, pp. 321-335.

27th Rept. N. Y. State Museum, Albany, 1874, pp. 117-131.

Brief remarks on Cumberland area. The map to accompany this paper was not pub-
lished till the next year in the 28th Ann. Rept.

JONES, I. D. Report and Journal of Proceedings of the Joint Com-
missioners to Adjust the Boundary Line of the States of Maryland
and Virginia, Annapolis, 1874.

Md. House Doc. 1874 J; Senate Doc. E.

Gives many facts on old maps, charts and state lines.

LATROBE, H. B.

(See Merrill, Wm. E.)

LESLEY, J. P.

(See Merrill, Wm. E.)

MERRILL, WM. E. Extension of the Chesapeake and Ohio Canal
to the Ohio River. Including reports by J. S. Sedgwick, Totten,
Poussin, Lesley and Latrobe.

House Doc. No. 208, 43rd Cong., 1st Sess., 59 pp.

Discussion of country between Cumberland, Md., and Pittsburgh, Pa.

SEDGWICK, J. S. Report of Instrumental reconnaissance and ex-
amination for the Extension of the Chesapeake and Ohio Canal.

(See Merrill, Wm. E.)