File:PSM V21 D210 Stereoscope with adjustment for natural perspective.jpg

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Description Stereoscope with adjustment for natural perspective
Date
Source Popular Science Monthly Volume 21
Author Unknown authorUnknown author
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current04:52, 26 August 2010Thumbnail for version as of 04:52, 26 August 20102,184 × 1,567 (414 KB)Ineuw{{Information |Description = Stereoscope with adjustment for natural perspective |Source = http://en.wikisource.org/wiki/Page:Popular_Science_Monthly_Volume_21.djvu/210 |Date = 1882 |Author = Unknown |Permission = {{PD-old}} |other_versions = }} [

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