A treatise on heliochromy: or, The production of pictures, by means of light, in natural colors. Embracing a full, plain, and unreserved description of the process known as the hillotype, including the author's newly discovered collodio-chrome, or natural colors on collodionized glass
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actinic alcohol alloy Ambrotype ammonia bath beautiful Becquerel Bismuth blue bottle bromine camera carbon CHAPTER chemical chloride of gold chloride of silver chlorophyl Chromate coating collodion colored image colored rays colorific coloring matter compound copper cyanide Daguerre Daguerrean daguerreotype daguerreotype plate daguerreotypists dark developed dilute discovery dissolve drachm ether experiments exposed exposure filter formed gallic acid give glass grains green heat heliochromic Hill's Hillotype hydrofluoric acid hydrogen hyposulphite immerse iodide iodine iodized Iridium iron juice L. L. Hill leaves light liquid mercury metals minutes mixture Morse muriatic acid natural colors Niepce nitrate of silver nitric nitric acid obtained oxyde paper perfect Phosphuretted photographic picture polished portraits precipitate Prince's Metal produced rinse salt saturated silver plate soak soda solution of nitrate specimens substances sulphuric acid surface tints tion vapor vegetable violet wash Westkill Xanthophyl yellow York zinc