Images Dated 22nd April 2013

James Watt, caricature C015/6706

James Watt (1736-1819). Caricature of the Scottish engineer and inventor James Watt. Watt made numerous practical improvements to the steam engine of his day. By 1790, the superior Watt steam engine had completely replaced the older Newcomen variety. His inventions included the double acting engine, where the piston is made to both push and pull (1782), and the pressure gauge (1790). He also adopted the centrifugal governor to regulate the speed of a steam engine and coined the term horsepower to describe a unit of energy

© GARY BROWN/SCIENCE PHOTO LIBRARY

A Goldeneye runs on the surface of a river near the remote village of Sosnovy Bor

A Goldeneye runs on the surface of a river near the remote village of Sosnovy Bor, some 320 km (200 miles) north of Minsk, April 21, 2013. Picture taken April 21, 2013. REUTERS/Vasily Fedosenko (BELARUS - Tags: ANIMALS ENVIRONMENT) - GM1E94M1QWK01

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Asclepias, Asclepias curassavica

Glass winged butterfly, Greta Oto feeding on Bloodflower, Asclepias curassavica. This butterfly is so called because its wings lack coloured scales and give the impression of glass

© Paul Tomlins / Flowerphotos

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