File:Davinci-valve-flush.jpg
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Leonardo's fake sketch of the first known depiction of a valve flush toilet; via Anthony Ravielli from Codex Madrid I, a page allegedly discovered in 1975. April Fool's joke by Martin Gardner, in Scientific American (April 1975). See also: [1], [2], [3]
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| Date/Time | Thumbnail | 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) |
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