Before revision: Muslim engineers also used water turbines, employed gears in watermills and water-raising machines, and pioneered the use of dams as a source of water power, used to provide additional power to watermills and water-raising machines.Ahmad Y. al-Hassan, Transfer Of Islamic Technology To The West, Part II: Transmission Of Islamic Engineering Al-Jazari (1136–1206) described designs for 50 devices, many of them water-powered, in his book, The Book of Knowledge of Ingenious Mechanical Devices, including water clocks, a device to serve wine, and five devices to lift water from rivers or pools.
After revision: Muslim engineers also used water turbines, employed guhuybvcdsaxzq2xwsecrdvtfbygnhmujhgffhahahahahauhfuhcunfhu thru hu URL |date=18 February 2008</ref> Al-Jazari (1136–1206) described designs for 50 devices, many of them water-powered, in his book, The Book of Knowledge of Ingenious Mechanical Devices, including water clocks, a device to serve wine, and five devices to lift water from rivers or pools.