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Blackhawk - Iron City Stamp Mill (Int.)

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Call Number	K-178
Title	Blackhawk - Iron City Stamp Mill (Int.)
Creator(s)	Kemp, Donald Campbell, 1889-1975.
Summary	mortars and amalgamated with the gold in the ore. The stamps were periodically stopped and the amalgam was retrieved and then sold to banks or the mint.; The interior of a stamp mill, possibly the Iron City Stamp Mill in Blackhawk, Colorado, shows the complex design of the mills, designed to crush the ores found in local mines to extract gold from them. Each "stamp" weighed between 500 and 700 pounds. Once crushed, the ore was fed into iron mortars, where a stream of water carried it to a sheet-iron screen. The ore was forced through the screen and onto sloping, mercury-coated copper plates. Mercury was also fed into the
Date	[between 1935 and 1950?]
Notes	coll." written on paper stuck to back of print; image is copy of earlier photograph taken by unknown photographer, possibly A.M. Thomas.; Title from inventory prepared by Western History Department, Denver Public Library; words "A stamp mill interior; believed to be Iron City Stamp Mill, Black Hawk. Shows 3, ten-stamp batteries, each having 2 5 stamp sections. Foreground - Showing concentrating tables to treat the ground over from the stamps. Known locally as Gilpin County Bumping Tables, they were a product of the MacFarland foundries in Central City and Black Hawk (photo source unknown) ca. 1890's Kemp ; R7001251785
Physical Description	1 photonegative ; 10 x 12 cm. (3 3/4 x 4 3/4 in.); 1 photoprint ; 12 x 19 cm. (4 3/4 x 7 1/4 in.)
Subject	Ore-dressing plants--Colorado--Blackhawk--1870-1910. Ore-dressing--Colorado--Blackhawk--1870-1910. Blackhawk (Colo.)--1870-1910. Gilpin County (Colo.)--1870-1910. Gold mining--Colorado--Blackhawk--1870-1910.
Rights	Restrictions applying to use or reproduction of this image available from the Western History/Genealogy Dept., Denver Public Library.
Reproduction Available for Purchase	Yes (digital reproduction)
Type of Material	Film negatives.; Photographic prints.; Imaged.; Image
Format-Medium	Photograph
Filename	00125178.tif

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