File:Erygmascope - Project Gutenberg eText 14009.png
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- Project Gutenberg eText 14009 - https://gutenberg.org/dirs/1/4/0/0/14009/14009-h/14009-h.htm - Template:PD-Gutenberg
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Captioned As
| Page | Caption |
|---|---|
| Erygmascope | Illustration of a Trouve Erygmascope in Scientific American, 1891 |
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