File:Babbage sign language.jpg
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Babbage_sign_language.jpg (384 × 451 pixels, file size: 77 KB, MIME type: image/jpeg)
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 19:56, 25 April 2013 | ![]() | 384 × 451 (77 KB) | Charles Matthews | {{Information |Description ={{en|1=w:Charles Babbage, description of a sign language for mechanical components.}} |Source =http://archive.org/stream/philtrans09445034/09445034#page/n3/mode/2up |Author =Charles Babbage |Date ... |
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