MARYLAND GEOLOGICAL SURVEY 263

OWEN, ROBERT DALE. Hints on Public Architecture, containing
among other illustrations views and plans of the Smithsonian Institu-
tion; together with an appendix relative to building materials. 1849.
4to. pp. 140-199. Woodcuts, 15 plates. (No. P.)

Gives many facts and figures concerning Maryland sandstones, marbles and granites,
in the appendix.

1850.

ANON. Twenty-fourth Annual Report of the President and Direc-
tors to the Stockholders of the Baltimore and Ohio Rail Road Com-
pany. 8vo. 54 pp. 1850.

Folded map, showing route between Baltimore and St. Louis, together with the
other principal lines on the Eastern, Middle and Western States, 39 miles to the inch.

GRAHAM, J. D. Message of the Governor of Maryland transmit-
ting reports of the Joint Commissioners and of Lt. Col. Graham,
U. S. Eng., in relation to the intersection of the boundary lines of the
States of Md., Pa., and Del. Washington, 1850. 8vo. 87 pp.

(Little map on the scale 1/15,840, showing location of " tg point.")

HIGGINS, JAS. Report of James Higgins, M. D., State Agricul-
tural Chemist, to the House of Delegates. 8vo. 92 pp. Annapolis,
1850.

Md. House of Delegates, Dec. Sess. [G].

Deals principally with Eastern Shore, and Includes several analyses, especially of
marl.

1851.

ANON. Field notes of the Surveyors employed to run the Trans-
peninsular Line in 1751. 40 pp. 8vo.

Gilmor Md. Papers, vol. ii, Div. 3, No. 1. Md. Hist. Soc. Misc. Pub.

BAILEY, J. W. Miscellaneous Notices. 3 Fossil Infusoria of
Maryland.

Amer. Jour. Sci., 2nd ser., vol. xi, 1851, pp. 85-86.

JOHNSON, W. R. A Comparison of Experiments on American and
Foreign Building stones to determine their relative strength and dura-
bility.

Amer. Jour. Sci., 2nd ser., vol. xi, 1851, pp. 1-17.

Gives pressure tests, analyses and the geological occurrence of the Cockeysville and
Texas marbles and " alum " stoues.

———— Some observations on the Gold Formations of Maryland,
Virginia and North Carolina.

Proc. Amer. Assoc. Adv. Sci., vol. iv, 1851, pp. 20-22.