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McClees & Germon
Father and Son in a Mascher Stereoscope Case
Daguerreotypes, 1/6 plates, stereo, Mascher case
Cornell University Library
Curational comment from "Dawn's Early Light: The First 50 Years of American Photography", October 20, 2011 - May 4, 2012, Hirshland Exhibition Gallery in Carl A. Kroch Library, Cornell University
John F. Mascher patented this ingenious case in 1853. The dual image, captured stereoscopically, can be viewed in three dimensions with a pair of lenses that fold out from the viewing case.