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SOME PIONEERS OF PHOTOGRAPHYWEDGWOOD AND NIEPCE
FOXTALBOT AND THE CALOTYPE PROCESS
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Abney action of light albumen amateur ammonia bath Becquerel bitumen British Journal bromide of silver calotype camera carbon cess CHAPTER chemical chloride of silver collodion emulsion collodion process colors containing copies Daguerre Daguerreotype dark-slide developed discovery dissolved dried dry-plates employed England experiments exposed exposure film fixing agent formed Fox-Talbot gallic acid Gaudin gela gelatine emulsion gelatino-bromide glass plates grains Herschel HISTORY OF PHOTOGRAPHY hypo hyposulphite of soda insoluble introduced iodide of silver iodized JEROME HARRISON Journal of Photography lens MANUFACTURING metal method mixture negative Niepce nitrate of silver objects obtained ordinary paper coated paper negatives patent Photo picture placed platinotype potash potassium practical prepared produced published pyrogallic acid rays roller roller-slide salts of silver sensitive paper silver bromide silver chloride silver iodide silver nitrate silver plate silver salt soaked soluble spectrum substance Talbot tannin tint tion tographic toning transparent washed Wedgwood yellow