Researches on Light in Its Chemical Relations: Embracing a Consideration of All the Photographic Processes

acid acted action appears beautiful becomes blue bodies brown camera carbonic chemical chloride colour combination considerable continued copper covered dark darkened described effect employed entirely equal evident examination existence experiments exposed exposure extends extreme fact fixed fluid formed give glass gold green heat impression influence intensity iodide iodine iron least leaves length less Light lines luminous manner matter means mercury metallic minutes nature nearly nitrate of silver observed obtained orange oxide paper passed phenomena photographic picture placed plants plate portion positive potassium precipitate prepared present principle prismatic produced proved pure quantity radiations received red rays refrangible remarkable removed rendered salt sensitive similar Sir John Herschel solar rays solution space spectrum sufficient sun's sunshine surface tint tion vapour violet rays visible washed whole yellow