Photographic Film: Other long-established infacttires are furniture, clothing, and jewelry. 1945 numerous light industries have devel-notably foodstuffs, paper products, and ils. Among the larger factories are those rayon, soap, pasta, and light engineering itries. There are over a dozen film produc-|studios in Rome, and the film industry is now IJJor source of revenue for the city. The 1 of the film industry is Cinecitta (cinema j a few miles outside of Rome; it contains : of the finest studios in the world. There also numerous workshops for photographic film ises.
Speedlights flash, the picture is taken, the film automatically advances, the shutter is cocked, and all is in readiness for the next child in the line. Similar cameras are available which operate with 35mm film. The smaller film cuts costs a bit but naturally the contact prints are not so appealing as those from the larger film.
Method of Forming Reflection Reducing Films.-H. Dennis Taylor discovered in 1892 that a tarnished photographic film lens transmitted more light than a new lens. Tarnishing is the gradual formation of a surface film by a spontaneous atmospheric leaching action. F. Kollmorgen (1916) and F. E. Wright (1921) treated many optical glasses to increase light transmission. Acid solutions leach a uniform film of optical quality on barium and flint glasses, described by Frank L. Jones (1941), and hydrofluoric acid vapor leaches a skeletonized silica film on ordinary glasses according to F. H. Nicoll and F. E. Williams (1943).
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Photography
