The prospector's manual, for the discovery of quartz and placer indications of gold and silver mines : also, a description of mineral-bearing rocks, indications of the mineral districts in all the New-England states and the neighboring provinces, the characteristics of California, Nevada, and other mines, simple methods of assaying gold and silver ores, and a glossary of scientific and technical terms / - Schofield, William J. (W.J. Schofield & Co., 1875)