Plotts, William - ISOGEOTHERM HYPOTHESIS Of Mineral Occurrence and Origin. ORIGIN Of PETROLEUM, Coal and Other Carbonaceous Products. Showing how these products occur in orderly, definite, limited horizons, independently of the plane of stratification

Whittier, California: W. A. Smith's Print Shop, 1911. 1st printing. Brown limp leather binding, yapp edges & leather cord tie. Now housed in an archival mylar sleeve. 68 pp. Headpieces. 8vo. 10-1/8" x 6-5/8". Sunning to binding. Bookplate. A VG copy.

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