Drainage wheel from <a href="//commons.wikimedia.org/wiki/Category:Tinto_River" title="Category:Tinto River">Rio Tinto</a> mines, in the Sierra Morena mountains of Andalusia, Spain.
<dl><dd><dl><dd><ul><li>Ancient Roman mine's drainage technology.</li></ul></dd></dl></dd></dl>
<a href="https://en.wikipedia.org/wiki/User:Peterlewis" class="extiw" title="wikipedia:User:Peterlewis">Peterlewis</a> at <a href="https://en.wikipedia.org/wiki/" class="extiw" title="wikipedia:">English Wikipedia</a>
20 March 2008 (original upload date)
Own scan of old journal, transferred from <a class="external text" href="https://en.wikipedia.org">en.wikipedia</a>