Gem Mining Company; Gem Mines, Idaho Springs, Colorado: The Gem Mines as Seen Through the Camera. Henri & Bernhard Wolf & Co. Inc. 280 Madison Ave, New York, circa 1918. Oblong quarto, pp. 30, primarily photographs, 1 folded map, (Idaho Springs Special, USGS).
The work is complete and in the original soft title wraps. Binding is very clean with only minor cover toning, text and images are near fine, map is clean and bright. Book plate on inside of cover. In very good to near fine condition.
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This promotional piece offers an excellent view of the above ground and underground workings of the Gem Mine workings in Idaho Springs, Colorado. The Gem lodes produced primarily telluride ores of gold and silver and was a major Colorado contributor of shipments of telluride ore.