Hallberg, Josef Henrik, 1874- · New York city, The Moving picture world · leaf 195
rs do not permitthe setting of the carbons to advantage in any other way. Fig. 109 is an exact reproduction of the a.- c. arc in an 188 MOTION PICTURE ELECTRICITY ordinary moving picture machine lamp house operatingon 6o-cycle alternating current between two high gradey% in. soft cored carbons. The… … UpperGarboof Upper Grader^Short and White arc. in fdcuiwiCI) upper crater.^Exposed lower Crater m Focus witlrbotb upper Crater and Cbearc/ Lower Carbon. Fig. 109 I desire to call particular attention to the surfaces of theupper and lower craters, both of which are fully exposed,slanting at a slight…
Motion picture theaters · Electric lighting
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
