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Archimedes screw

141 bytes removed, 06:13, 6 November 2012

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Archimedes' screws, now called screw conveyors, are also used today primarily to propel dry bulk materials. However, if you do not have access to a generator pump and need a low-tech solution to raise water, it doesn't get much easier and low-tech than an Archimedes' screw. <ref>[http://www.ehow.com/how_8725014_build-handpowered-water-pump.html How to build and hand-powered water pump.] By Andrew Latham, eHow Contributor.</ref>

Read more: How to Build a Hand-Powered Water Pump | eHow.com http://www.ehow.com/how_8725014_build-handpowered-water-pump.html#ixzz2BQ6rI8E6

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