Emmons, Samuel Franklin; Geology and Mining Industry of Leadville, Colorado, text and atlas.

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255-E
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Product Description
Emmons, Samuel Franklin; Geology and Mining Industry of Leadville, Colorado, text and atlas. U. S. Geological Survey, Monograph 12, Washington, D. C., 1883. Large quarto text, pp. xxix, 770. 45 plates (some double page), 6 text figures. Elephant folio atlas, 35 sheets of plates; being maps, sections and profiles, most in color (12 double page). 
 
The text is in the original brown cloth with gilt titles. The binding is tight and clean with light spotting to spine and light shelf bumping to corners. Two owner’s names in gilt on upper and lower spine edge. Charles Jame Hughes Jr. (US Senator from Colorado) and Gerald Hughes on lower spine edge. The atlas has never been bound with all sheets present and very clean. The sheets are housed in a sturdy clam shell box with the atlas cover preserved on the clam shell box. An exceptionally clean set. Rare with both text and atlas present.
 
Emmons (1841 – 1911) was a prominent American geologist and economic geologist. He graduated from Harvard University in 1861 and studied at the Ecole des Mines in Paris, France, from 1862 to 1864 and at the Freiberg (Saxony) mining school in 1865. In 1867, he was appointed assistant geologist under Clarence King on the Geological Exploration of the Fortieth Parallel. In 1879 Emmons became geologist in charge of the Colorado division of the United States Geological Survey. Throughout his career, Emmons travelled extensively studying geology and ore deposits, especially in the western United States. His studies of the Leadville region is one of his best known works. This work was just one of many publications by the USGS pertaining to the mining regions throughout the united States. 
In his field work in Leadville, Emmons first studied the structural geology of the region, determined the types of rocks present and the strata. He then focused on the ore deposits and their types, the petrography and  the extent of those ore bodies. The petrography was studied by Whitman Cross. The remainder of the work is devoted to the mining industry, the mines and the ore production and processing methods. The work remains a cornerstone to Leadville's mining history. Maps in the atlas include: Central Colorado, Mosquito Range, Leadville and Vicinity, Iron Hill, Carbonate Hill, and Fryer Hill. Other sheets contain a table of contents, map legends, local names of formations. The work will remain a major historical piece of literature on Leadville, Colorado. 
This particular set was originally owned by Charles James Hughes Jr. (1853-1911). Hughes moved to Denver in 1879 and was a professor of mining law at the University of Denver and then at Harvard University. His interest in politics led to his becoming a Presidential elector from Colorado in 1900 and his eventual election as a U.S. Senator in 1909. It would appear that the set went from Charles to his son Gerald Hughes (1875-?) on the death of Charles in 1911.