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Bow Waterwheel Windmill Counterpoise Siege Engines Anchor Escapement • Centrifugal • Governor • • 1200 CE 1300 1400 1500 1600 1700 1800 1900 Ingenium Timeline Arrow lengths indicate roughly the era of each machine —when it was important to our history. Dotted lines for bows and waterwheels indicate that these machines originated in antiquity . Names are of key inventors. There are biographical details of the underlined names in the text. Clement• Hooke • Huygens• Graham • Harrison• Le Roy • Lee • Mead • Smeaton • Poncelet • •Watt •Maxwell •Vyshnegradskii • • • • • • • • This page intentionally left blank ...

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