Bayard, Hippolyte

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b. 1801 Breteuil-sur-Noye, France d. 1887
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French photographer, inventor of an early direct positive paper process.
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Educated as a notary's clerk, Bayard began his working life in Paris in the Ministry of Finance. His interest in art led him to investigations into the chemical action of light, and he began his experiments in 1837. In May 1839 Bayard described an original photographic process which produced direct positive images on paper. It was devised independently of Talbot and before details of Daguerre's process had been published. During the same period, similar techniques were announced by other investigators and Bayard became involved in a series of priority disputes. Bayard's photographs were well received when first exhibited, and examples survive to the present day. Because the process required long exposure times it was rarely practised, but Bayard is generally credited with being an independent inventor of photography.
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Bibliography
1840, Comptes rendus (24 February): 337 (the first published details of Bayard's process).
Further Reading
H.Gernsheim and A.Gernsheim, 1969, The History of Photography, rev. edn, London.
JW

Biographical history of technology. - Taylor & Francis e-Librar. . 2005.

Look at other dictionaries:

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  • Hippolyte Bayard — Pour les articles homonymes, voir Bayard. Hippolyte Bayard, Autoportrait (1863) Hippolyte Bayard (Breteuil sur Noye, 20  …   Wikipédia en Français

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  • Hippolyte (Begriffsklärung) — Hippolyte (griechisch Ἱππολύτη, lateinisch Hippolyta) ist: in der griechischen Mythologie: Hippolyte, Tochter des Ares, eine Amazone Hippolyte (Tochter des Kretheus), Gattin des Akastos von Iolkos, Verleumderin des Peleus Hippolyte (Tochter des… …   Deutsch Wikipedia

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  • Bayard — Cette page d’homonymie répertorie les différents sujets et articles partageant un même nom.  Cette page d’homonymie répertorie des personnes (réelles ou fictives) partageant un même patronyme. Le patronyme Bayard renvoie au fameux cheval… …   Wikipédia en Français

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