Image:Davinci-valve-flush.jpg
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Leonardo sketch of the first known depiction of a valve flush toilet; via Anthony Ravielli from Codex Madrid I, this lost page discovered in 1975. via Martin Gardner, in Scientific American (April 1975).
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| Date/Time | Dimensions | User | Comment | |
|---|---|---|---|---|
| current | 11:01, 1 April 2005 | 1,002×846 (121 KB) | Sj (Talk | contribs) | (Leonardo sketch of valve flush toilet (note paper holder in background)) |
| 10:59, 1 April 2005 | 1,003×866 (123 KB) | Sj (Talk | contribs) | (Leonardo sketch of valve flush toilet; via Anthony Ravielli from ''Codex Madrid I'') |
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