Moving Picture Age (1920) . the port-able motion picture projecting machinewithout an apology—is compact,simple, motor or hand driven, weighsonly 19 pounds (25 with motor),throws a pertect picture 8 ft. or 80 wondertul brilliancy and uses anystandard films. Can be reversed in-stantly to repeat any portion to any electric light lens arrangement, eliminatesfire danger. Shows any frame on afilm as a still, like a stereopticon. Operates Equally Well onStorage Batteries The most practical machine everoffered for class room work. Easilycarried from class to
Moving Picture Age (1920) . the port-able motion picture projecting machinewithout an apology—is compact,simple, motor or hand driven, weighsonly 19 pounds (25 with motor),throws a pertect picture 8 ft. or 80 wondertul brilliancy and uses anystandard films. Can be reversed in-stantly to repeat any portion to any electric light lens arrangement, eliminatesfire danger. Shows any frame on afilm as a still, like a stereopticon. Operates Equally Well onStorage Batteries The most practical machine everoffered for class room work. Easilycarried from class to class. Ask for booklet giving full descrip-tion, prices, are experts in the field of picture projection andshall be glad to help you work out any problem alongthis line. Motion picture supplies of all kinds always in theater equipment is advised for Educationalwork wherever a permanent installation is possible. Exhibitors Supply Company Edncational Department, 1881 Transportation Bldg., Chicago (l273). The American Projectoscope While the first development of the projector was in the fieldof entertainment because that was where the most profitable pro-motion of sales could be made, machines for the use of teachers,lecturers, sales managers, and salesmen soon made their appearanceand have been passing through various stages of development forseveral years. To meet the requirements of these various fields,portability was the first essential. And, to accomplish portabilitycombined with steadiness, safety from fire dangers, clearness of pro-jection and smoothness of operation was no slight task. There was one machine of this character which was planned ona unique basis, especially in producing a bright light without gen-erating an amount of heat that inevitably endangered the films. Indeveloping this feature, another function, namely, that with a coollight it is possible to show any point of a film as still, as a stere-opticon picture, and to run the film bac
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectmotionp, bookyear1920
