Hallock, William.
—Preliminary Report of Observations at the Deep Well at Wheeling, W. Va. 3 pp.—Proc. A. A. A. S. 1891.
—(and F. Kohlrausch.)
—Ueber den Polabstand, den Inductions—und Temperatur—Coefficient eines Magnetes und ueber die Bestimmung von Trägheitsmomenten durch Bifilarsuspension. 20 pp.—Nachrichten Koenigliche Gesellschaft der Wissenschaften, 1883.
Hatcher, J. B.
—The Titanotherium Beds. 18 pp., Ill.—Am. Naturalist. 1893.
—The Ceratops Beds of Converse County, Wyoming. 10 pp.—Am. Jour. Sci. Feb. 1893.
Hay, O. P., Ph.D.
—The Northern Limits of the Mesozoic Rocks in Arkansas. 30 pp.—Annual Report Geol. Surv. Ark. 1888.
Hobbs, Wm. H.
—Secondary Banding in Gneiss. 6 pp. 1 pl., Ill.—Bull. Geol. Soc. Am., 1891.
—Notes on a Trip to the Lipari Islands. 12 pp. 1 pl., Ill.—Wis. Acad. Sci., 1892.
—On Intergrowths of Hornblende with Augite in Crystalline Rocks. 1 p.—Science, Dec. 23, 1892.
—Phases in the Metamorphism of the Schists of Southern Berkshire. 12 pp. 1 pl., Ill.—Bull. Geol. Soc. Am., Feb. 1893.
Holmes, W. H.
—Geology of the Elk Mountains, Col. (1874.)
—Geology of Southwestern Colorado. (1875.)
—Geology of the Yellowstone Park. (1880.)