. Motion picture electricity. Fig. 102 For further consideration, and to make the matter still •more clear, I submit Fig. 101, which shows the alternatingcurrent arc at the instant the upper carbon receives thepositive impulse. At that instant, the upper carbon crateris at maximum intensity, and the lower carbon crater is ofmuch lower intensity. In fact, Fig. 101 can be comparedwith the ordinary direct current arc where the upper car-bon is connected to the positive wire, but only for oneinstant, or for 1/60 of a second on a 60-cycle system. Fig. 102 is intended to show the alternating current
. Motion picture electricity. Fig. 102 For further consideration, and to make the matter still •more clear, I submit Fig. 101, which shows the alternatingcurrent arc at the instant the upper carbon receives thepositive impulse. At that instant, the upper carbon crateris at maximum intensity, and the lower carbon crater is ofmuch lower intensity. In fact, Fig. 101 can be comparedwith the ordinary direct current arc where the upper car-bon is connected to the positive wire, but only for oneinstant, or for 1/60 of a second on a 60-cycle system. Fig. 102 is intended to show the alternating current arcat the instant when the lower carbon receives a positiveimpulse, under which condition the lower crater is atmaximum intensity, causing the upper crater to give avery small amount of illumination, as would be the case 176 MOTION PICTURE ELECTRICITY with a direct current arc if the wires were reversed sothat the lower carbon would be connected to the positivewire, which, as is generally known, would give a purpleand unsa
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