File:Megalethoscope.jpg
Megalethoscope.jpg (653 × 490 pixels, file size: 297 KB, MIME type: image/jpeg)
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 16:23, 13 June 2007 | ![]() | 653 × 490 (297 KB) | AndreasPraefcke | {{Information |Description=Ponti's Megalethoscope <br />Collection: Princeton University Library |Source=own photograph |Date=June 2007 |Author=Andreas Praefcke |Permission= |other_versions= }} {{PD-self}} [[Category:Optical devices |
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