Invented by American naval officer and inventor, Bradley Allen Fiske, reading machines were used for reading miniaturized texts which were photo-engraved onto cards.
Fullsize image: https://diqn32j8nouaz.cloudfront.net...e_fullsize.jpg
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Previously:
https://www.homemadetools.net/forum/...062#post125604
https://www.homemadetools.net/forum/...921#post148752
https://www.homemadetools.net/forum/...933#post124846
