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Leaching

 Subject
Subject Source: Library of Congress Subject Headings

Found in 1 Collection or Record:

Michigan Technological University Archives' Glass Slide Collection

 Collection — Box 1
Identifier: MS-816
Abstract

Collection, mostly undated, of glass slides collected by the Michigan Technological University Archives in Houghton, Michigan. Includes a Michigan College of Mines alumni reunion in 1911, miscellaneous copper and iron mining scenes, a photographic print of the Calumet and Hecla dredge, and images of the ammonia leaching process at the Calumet and Hecla Lake Linden plant.

Dates: undated