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1.
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An additive phoroptor, from the American Optical Company. The apparatus measures 25.5 x 21 cm, and is housed in a black cloth drawstring bag. The eye pieces are marked "D [...]
Still image |
Historical Collections and Archives |
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2.
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An additive phoroptor, from the American Optical Company. The apparatus measures 25.5 x 21 cm, and is housed in a black cloth drawstring bag. The eye pieces are marked "D [...]
Still image |
Historical Collections and Archives |
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