The stereoscope and stereoscopic photography (1890)
Drouin, F. (Felix) · Bradford ; London : Percy Lund, The Country Press · leaf 52
being left in the side for the insertion. One part of the top of the box consists of adoor on hinges, which can be opened to allowlight to fall on the picture, and the interior face ofthis door is fitted with a mirror. The use of thebox is to keep out all light except that reflectedby the mirror,… … Fig. 30. 46 THE STEREOSCOPE the eyes. This precaution, often neglected, is,however, of real use. Figs. 30 and 31 are models of stereoscopeswith prismatic lenses, which until comparativelyrecently were the forms usually sold in thiscountry. They are made like the preceding one.
Stereoscope · Photography, Stereoscopic
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