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Ambrotypes (photographs)

 Subject
Subject Source: Art & Architecture Thesaurus
Scope Note: Photographs produced by mounting a negative (made by a variant of the wet collodion process) that is on glass with a dark backing, which makes the image appear as a positive. Came into wide use in the United States in the early 1850s.

Found in 1 Collection or Record:

Robert B. Fisher photograph collection and papers

 Collection
Call Number: WA MSS S-2823
Overview: This collection chiefly consists of photographs collected by Robert B. Fisher, but also includes his subject files and a small quantity of writings related to the history of photography, 1840-1998.
Dates: 1840-1998