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Early Researches on the Chemical Action of the Solak Rays
Heliografhy The Peocess of M Niepce
Mr H Fox Talbots Photogenic Drawings Calotype c
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actinic action of light albumen alcohol ammonia appear applied beautiful bichromate of potash blackened blue bromine calotype camera obscura chemical chloride chloride of silver coating Collodion processes colour copper copy cotton Daguerre daguerreotype daguerreotype plate dark darkened degree dissolved distilled water drachms dried effect employed experiments exposed exposure fixed fluid fluid ounce focus gallic acid gold grains heat hydriodic hyposulphite of soda impression influence intensity iodide of potassium iodide of silver iodine iron lens liquid luminous mercurial vapour mercury metal minutes muriate necessary negative Niepce nitrate of silver nitric acid object obtained operation ounce of water oxide peculiar photogenic photographic photographic paper picture placed polished portion potash potassium precipitate produced quantity radiations refracted remarkable removed rendered sensibility sensitive sheet Sir John Herschel solar solution of nitrate spectrum sufficient sunshine surface Talbot tint tion washed