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Scientific American, Vol. 81, No. 22 (1899) (1899)
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onthe collector, and rotation of a ‘lightning light” was not infrequently does away with the old method of detecting irregulari- one complete revolution in ten seconds. To get this ties by means of decoys. ‘The indicator always an- speed with lenses weighing as much as three tons sup- nounces… … and a bearing can be taken from it and a course steered the false time on the box. Its adoption does not cail for the abandonment of any part of the present box to it with absolute certainty when it is once picked © 1899 SCIENTIFIC AMERICAN, INC.Internet Archive · Public domain (published before 1931). Free to use for anything.
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