Daguerreotype
Louis Jacques Mandé Daguerre first introduced the daguerreotype in 1839 in 1839, and it was the first publicly announced photographic process. Daguerreotypes are produced by treating a silver-coated copper plate with light-sensitive chemicals, exposing it in a camera, and developing it with a mercury vapor. Harvard University has collected these unique documents for over 150 years, and this...
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