Sir John Herschel

Sir John Herschel was born on March 3, 1792 in Slough, Great Britain. He was a scientist and an astronomer like his father. Herschel attended the University of Cambridge in 1809. Herschel was an accomplished chemist and discovered a "fixer" for photographs in 1819 called sodium thiosulfate. He experimented with paper photographs and coined the terms photography, positive, and negative (referring to the photographic process). He named the moons of Saturn and Uranus, he had an influence on Charles Darwin, and in 1840 he invented the Cayanotype, a blue and white phtograph. He died May 11, 1871.
























The Getty Museum
http://www.rleggat.com/photohistory/history/herschel.htm
wikipedia.com
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