MARYLAND GEOLOGICAL SURVEY 367
1837.

ALEXANDER, J. H. Map of the Proposed Rail Road from Fred-
ericktown to the Pennsylvania Line. (With two profiles.)
Report on the new map of Maryland, 1836, opp. p. 92 or 104.
22 1/2x11 1/4, hachured. Scale 1:95040. (J. H. U.) (Peabody.)

———— Reconnoissance for the Atlantic Rail Road and Profile.

Report on the new map of Maryland, 1836, facing p. 84 or 95.

18 3/4x5 1/2, legend horizontal scale 1:126720; vertical scale 1:12672. (.T. H. U., Peabody.)

———— Reconnaissance of the Choptank and Transquaking Canal.

Report on the new map of Maryland, 1836, after p. 60 or 66.

18 1/2x7, hachured. Horizontal scale 1:13000; vertical scale 1:860. (J. H. U., Peabody.)

———— Maryland.

Accompanying Outline of the Physical Geography of Maryland (etc.), by
J. T. Ducatel in Trans. Md. Acad. Sci. and Lit., vol. i, Baltimore, 1837, p. 54.

414x8, hachured, towns indicated by numbers. Scale 30 miles to an inch. (J. H.
U., Peabody.)

ALEXANDER, J. H., and DUCATEL, J. T. Map A (Geological map
along the Patuxent).

Report on the new map of Maryland, 1836, after p. 60 or 66.

23 1/4x1, hachured, geological remarks.

Scale 1:150000. (Peabody copy says "read Feb. 1837.")

———— Map B (Topographic map of Georges Creek.)

Report on the new map of Maryland, 1836, after p. 60 or 66.
19x6 1/4, hachured. Scale 1:84480 = 1 1/4 miles to an inch, location of coal veins. (J. H.
U., Peabody.)

LUCAS, FIELDING, JR. Small map of Maryland and Virginia.
(Phillips).

TRIMBLE, ISAAC. Map of the Country between Baltimore and the
Potomac embracing the several Routes, surveyed for the Maryland
Canal by F. Harrison under the direction of Isaac Trimble.

Report of the engineer on the subject of the Maryland Canal. Baltimore,
Lucas & Deaver, 1837.

24x20, outline, drainage, roughly hachured. Scale 1/125000, or 2 miles to an inch.
(J. H. U.)

1838.

ALEXANDER, J. H., and DUCATEL, J. T. Map A (Topographical
map of Cecil and Kent counties).

Ann. Rept. of the Geologist of Maryland, 1837.

21x13 3/8, hachured, geological remarks. Scale 1:150000, about 3 1/8 miles to an inch.
(Peabody.)