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The stereoscope and stereoscopic photography (1890)
Drouin, F. (Felix) · Bradford ; London : Percy Lund, The Country Press · leaf 42
stereoscopemakes it easier to use on a table, as it places themirrors on a level with the eyes of a seated person. Total Reflection Stereoscope.—Duboscqinvented this stereoscope for the examination oflarge pictures. It is formed of two isoscelesprisms P P, the use of which will be readily AND… … © j o Fig. 18. ment permits the use of two pictures placed onthe same level. It is better, therefore, to mountthem on one card, in order to avoid adjustmentafterwards, the pictures being once for all put intoposition in reference to each other. 3& THE STEREOSCOPE Direct Stereoscopes.—Eliott…Stereoscope · Photography, Stereoscopic
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