| Show recover silver from films of the MO movies how oue one of the large hollywood motion picture uro laboratories has turned ltd its tanks of old developing solutions into a silver mine yielding a month la Is told by the government bureau of standards the emulsion on undeveloped film consists largely of silver associated with bromine to for fonn in silver bromide when developed the silver bromide that has been exposed to light changes to metallic silver in the fixing bath the unchanged sliver silver bromide Is dissolved out leaving clear spaces where the film aim was in darkness every pound of silver bromide contains more jhan than nine ounces of sliver silver though mites of him film are run through the solutions weekly and tin I 1 I 1 they contain large quantities of silver they were formerly thrown into the sewer when their power was exhausted now by a at simple chemical process the all silver Is recovered and sold to the united states mint at san francisco 0 old id film Is also burned to recover the sll sit ver end and sometimes yields as much as 1000 1 worth woith of silver a month in addition it lon |
