Contemporary print of the main texts that marked the announcement of the Daguerreotype in 1839. It contains speeches delivered in the Chamber of Deputies by the Minister of Interior by François Arago by Gay Lussac, the procedure as described by Daguerre, also contains the description of Heliography by Nicéphore Niépce, some pieces of letters exchanged between the two and also description of the process of construction of the Dioramas.
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