MARYLAND GEOLOGICAL SURVEY 313

WOOLMAJNT, LEWIS. Artesian wells and water-bearing horizons of
Southern New Jersey (with a " note on the extension southward of
diatomaceous clays and the occurrence there of flowing artesian
wells").

New Jersey Geol. Surv., Rept. State Geologist for 1890, 1891, pp. 269-276.

Mention of the outcropping of diatomaceous deposits at Broad Creek, Herring Bay,
Patuxent River, Nottingham, Calvert county, Port Tobacco, also clay beds containing
diatoms at from 275 to 360 feet in wells at Cambridge, p. 275.

1892.

BABB, CYRUS C. The Hydrography of the Potomac Basin.
Amer. Soc. Civ. Eng., vol. xxvii, 1892, pp. 21-33.

Author considers the area of precipitation, rainfall, shape of valleys, etc. Discus-
sion, pp. 33-38, by G. H. Mendall, H. P. Durham, P. H. Newall and the author.

CLARK, WM. B. The Surface Configuration of Maryland.
Monthly Rept. Md. State Weather Service, vol. ii, 1892, pp. 85-89.
General summary of physical features.

CLARKE, F. W. Report of work done in the Division of Chemistry
and Physics, 1890-91.

Bull. U. S. Geol. Surv. No. 90, Washington, 1892.

House Misc. Doc., 52nd Cong., 2nd sess., vol. xxiv, No. 7.

Contains analyses of Dolomite from Cockeysville, by E. A. Schneider, p. 66. Granites
from Guilford, Sykesville and Woodstock and inclusions, by W. T. Hildebrand, pp. 66-67.

DALL, AV. H., and HARRIS, G. D. Correlation Papers—Neocene.
Bull. U. S. Geol. Surv. No. 84, 1892.

House Misc. Doc., 52nd Cong., 1st sess., vol. xliii, No. 337.
Gives a descriptive account with several columnar sections of the Miocene, also a
map showing distribution throughout the U. S., pp. 49-54.

DANA, E. S. Manual of Mineralogy. Wiley, New York, 1892.
1134 pp.

List of minerals and mineral localities in Maryland.

Also similar lists in earlier editions of Dana's System of Mineralogy.

DAY, D. T. Mineral Paints.

Mineral Resources U. S., 1889-90, Washington, 1892.

Statistics, p. 508.¹

———— (Editor). Infusorial Earth.

Idem.

Statistics, p. 459.¹

DAY, WM. C. Stone.

Idem.

Statistics of the limestone industry for 1888-89, p. 373; granite, p. 374; marble, p.
375; slate, p. 376. Details on stone industry, pp. 378-400, including analysis of Harford
county serpentine, by Dr. F. A. Genth (p. 400). See also p. 424.¹

¹ The statistics for the year are also given in the Eleventh Census.