Changes

Archimedes screw

145 bytes removed, 03:01, 3 November 2012

no edit summary

 

[[Image:archimedes screw.jpg|thumb|right|250px|Farmers in Egypt's Nile delta turn a traditional screw by hand to irrigate a field. Photo: [http://www.waterencyclopedia.com/Po-Re/Pumps-Traditional.html#b Waterencyclopedia.com]]]

Pumps, Traditional - river, largest, types, system, source, human http://www.waterencyclopedia.com/Po-Re/Pumps-Traditional.html#b#ixzz2B7nUpCPL

The Archimedes Screw (named after a Greek mathematician) is though to have been around since 250 B.C.E.

• ← Older edit
• Newer edit →

Winona

Akvopedia-spade, akvouser, bureaucrat, emailconfirmed, staff, susana-working-group-1, susana-working-group-10, susana-working-group-11, susana-working-group-12, susana-working-group-2, susana-working-group-3, susana-working-group-4, susana-working-group-5, susana-working-group-6, susana-working-group-7, susana-working-group-8, susana-working-group-9, susana-working-group-susana-member, administrator, widget editor

30,949

edits