L.J.M.Daguerre: history of the Diorama and the Daguerrotype

L.J.M.Daguerre: history of the Diorama and the Daguerrotype by Gernsheim, Helmut and Alison. paperback edition. ISBN: 9780486222905.

In 1829, Daguerre partnered with Nicéphore Niépce, an inventor who had produced the worlds first heliograph in 1822 and the first permanent camera photograph four years later.[1][2] Niépce died suddenly in 1833, but Daguerre continued experimenting and evolved the process which would subsequently be known as the Daguerreotype. It has recently been discovered that Daguerre may have mislead Niepces son about the value of the invention in order to better claim any profits from it individually. After efforts to interest private investors proved fruitless, Daguerre went public with his invention in 1839. At a meeting of the French Academy of Sciences on 7 January of that year, the invention was announced and described in general terms, but all specific details were withheld. Under assurances of strict confidentiality, Daguerre explained and demonstrated the process only to the Academys perpetual secretary François Arago, who proved to be an invaluable advocate. Members of the Academy and other select individuals were allowed to examine specimens at Daguerres studio. The images were enthusiastically praised as nearly miraculous and news of the Daguerreotype quickly spread. Arrangements were made for Daguerres rights to be acquired by the French Government in exchange for lifetime pensions for himself and Niépces son Isidore; then, on 19 August 1839, the French Government presented the invention as a gift from France "free to the world" and complete working instructions were published.