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M. Argo
 M. Arago was a noted French astronomer. He was an associate and savant of Louis Jacques Mande Daguerre, who dealt with the scientific problems of optics and chemistry involved in the search for photgraphic disovery. He experimented with the length of time, after the knowledge that nitrate of silver blackened in the light, before any successful experiments were made to fix the image of the camera by its use.
On the 19th of August, before the French Academy of Sciences, Arago presented Daguerre's secret of his Deguerreotype process. In his speach, He paid tribute to the memory of M. Joseph Nicephore Niepee, describing Niepee's process by which, after three days exposure, he succeeded in forming an image which could be retained on the plate. Arago will always be remembered for announcing to the world the discovery of photography. |
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