National Geographic : 1954 Sep
425 jiastman nouse 4 This Portrait of Eastman at 29 Tested His New Film In 1884 the young businessman patented "American Film," a paper roll coated with sensitized gelatin. After development the gelatin could be stripped from its base, becoming a transparent negative (page 436). This picture, though on American Film, is a print. Eastman made it from an unknown negative, prob ably glass, to see if the emulsion would reproduce a clear image. Later he signed and dated his laboratory experiment. The film was brittle, and in the course of years some pieces have broken off.