Beschreibung:

4°. Mit 7 Tafeln und 17 Textabbildungen. 2 Bll., XIX, 486 SS. Ldr. d. Zt. mit goldgepr. Rsch. (lädiert, stark beschabt und bestoßen, angestaubt, fleckig, Deckel gestempelt).

Bemerkung:

"50th Congress, 1st Session. House of Representatives Doc. No. 610".- Contents: "Brief outline of results. Statistics and history. Notes on foreign occurrences of quicksilver. The sedimentary rocks. The massive rocks. Structural and historical geology of the quicksilver belt. Descriptive geology of the Clear Lake region. Descriptive geology of Sulphur Bank. Descriptive geology of the Knoxville district. Descriptive geology of the New Idria district. Descriptive geology of the New Almaden district. Descriptive geology of the Steamboat Springs district. Descriptive geology of the Oathill, Great Western, and Great Eastern districts. Other deposits of the Pacific slope. Discussion of the ore deposits. On the solution and precipitation of cinnabar and other ores. The origin of the ore. Summary of results".