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Celebrating the Negative : Harold E. Edgerton by John Loengard

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Soon after photography was invented in 1839, scientists were taking pictures by the light of electric sparks. (Henry Fox Talbot patented a method for doing so in 1851.) In the 1930s Harold E. Edgerton of M.I.T. devised a way to discharge high voltage through a tube of rare gas, thus creating a spark bright enough to expose film in a millionth of a second.

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