Plat of the Poclepovich Quartz Mine, situated in Dry Town Mining District : Amador County, Calif., claimed by George Hearst / Surveyed by Geo. H. Perrin Deputy Surv. 1877.
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Perrin, G. H. (George Henry)
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Geological Survey of California
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The Geological survey of California was established in 1860 and began operation in 1863. J.D. Whitney served as State Geologist until the survey sas discontinued in 1874. Other individuals involved in the work of the survey included Amos Bowman, William H. Brewer, G.H. Goddard, S. Mather and Vitus Wackenreuder. (For complete list of names involved, consult the finding aid.) From the description of Geological survey of California records, 1844-1873. (University of California, Berkeley...