The Dictionary Of Photography

A True Historic Record Of The Art & Practice Of Photography 100 Years Ago.

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Automatic Printing Machines
is avoided, have been more successful - notably, the apparatus of Mr. Nievsky, which is shown in the subjoined sketch (Fig. 12), taken from the Photogram, the dotted portion being a black cloth tent, and the apparatus supplied by M. Faller, of Paris, the interior of which is shown by Fig. 13. (See also following article.)
Automatic Printing Machines. As far back as i860, Mr. Fontayne, of Cincinnati, had in operation an exposure machine in which two hundred exposures a minute were made upon a band of sensitive paper. Fontayne used sunlight con-centrated upon the negative by a large condensing lens, and at the meeting of the American Photographical Society, held on August 13th, 1860, Mr. C. H. Babcock exhibited bands of paper upon which Mr. Fontayne had made prints by his machine. In 1882 Mr. Tromel introduced a very much simplified form in which the paper was not exposed automatically; in fact, Mr. Tromel's device was really not much more than a com-bination of a roller slide and a printing frame ; but a year afterwards, Dr. Just, of Vienna, called renewed attention to the subject of automatic exposures on a band of paper, by exhibiting some interesting results at the Brussels Exhibition in 1883. He showed four series of prints made by ordinary daylight at the rate of from 400 to 500 an hour; the time required for exposure limiting the speed He also showed platinotypes printed on bands of paper by his machine, the rate of production being, of course, very slow in this case. Soon after this, Colonel Hoe, a member of the celebrated firm of printing-machine makers, Messrs. Hoe & Co., of New York, gave some attention to the matter, and suggested the possibility of newspaper printing by flashing the electric light a hundred times a minute, or six thousand times an hour, through a negative representing one side of the paper, and on to a web of sensitive paper passing under the negative. In 1886 Herr E. Krauss constructed an ingenious device by which numbers and letters might be impressed from transparent bands upon a sensitive plate, thus laying the founda-tion for something like a photographic type-writer, by which a " letterpress" negative may be made as rapidly as a type writing ; an interesting novelty in connection with a recent in-vention by Mr. Friese Greene. One form of Mr. Friese Greene's