Hallberg, Josef Henrik, 1874- · New York city, The Moving picture world · leaf 182
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…
Motion picture theaters · Electric lighting
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