books.google.fr - The discovery of light-sensitive chemicals in mid-nineteenth-century Europe carried large implications—for scientists, technicians, astronomers, and for the businesspeople who soon made family portraiture standard tabletop fare in middle-class homes. In The Daguerreotype: Nineteenth-Century Technology...http://books.google.fr/books/about/The_Daguerreotype.html?id=FLTyvuWX6MMC&utm_source=gb-gplus-shareThe Daguerreotype
