The London, Edinburgh and Dublin philosophical magazine and journal of science . 1 When the coil is arranged to give an intermittent direct dis-charge in the secondary only, one semicircle of light appears,as shown in fig. 25 ; and when the current is reversed, it is as in fig. 2b*. Fie:. Fi«r. 26. c

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Keywords: ., bookcentury1800, bookdecade1840, bookidlondon, booksubjectscience