The Moving picture world (September 1922)

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MOVING PICTURE WORLD Di FOR- BETTER. PROJECTION POWER'S olving Stereopticon F H RICHARDSON WE STRONGLY ADVISE AGAINST USING THE MOVING PICTURE PROJECTOR STEREOPTI- CON ATTACHMENT. There are two advantages in the dissolvcr as against the single stereopticon. F'irst, the dissolving out of one picture by the other is a much more pleasing effect than can pos- sibly be had with a single stereopticon. Second, when using a single stereopticon, unless the projectionist is very careful while removing or inserting slides, he will nio\ e the carrier, which will cause the picture on the screen to move or jump. This is not possible with the dissolver. Stereopticon pictures may be projected with a verj- much less brilliant light source than is necessary with motion pictures. .As a matter of fact high amperage for stereop- ticon projection is objectionable, because the resultant heat may and probably will crack the slide if it be left in the light for more than a very brief period of time. (jSafmcrs PuSfica/ion ADDS TO THE VARIETY and ATTRACTIVENESS of the PERFORMANCE REDUCES SLIDE BREAKAGE and CURRENT CONSUMPTION BETTER. PROJECTION PAYS J41CH0LAS POWER COMPANY EDWARD EA.RL.. F^wesioeM-r NiNETY Gold St. New York.N.Y.