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César-Nicolas-Louis Leblanc (1787-1835) was a French draughtsman and engraver, who left us with valuable drawings of machinery, etc.
1787 Born on 8 July in Paris, is the second son of Nicolas Leblanc, inventor of the process of extraction of soda.
1835 Died on 23 November 1835 in Fontenay.
Leblanc's role as a teacher of technical drawing at the Conservatoire des Arts et Métiers involved making contact with industrialists and machine builders, who he frequently visited with his pupils to carry out machine surveys on site. This benefited the archives of the Conservatoire, which kept up to date with the latest processes, at a time when the priority was to study British machines. From 1824 he engraved the plates for the Bulletin de la Société d'encouragement pour l'industrie nationale. His pupils included Jacques-Eugène Armengaud, who produced a number of plates, all signed by Leblanc.
The above information is condensed from the Wikipedia entry.