Cumming, Linnæus, b. 1843. [from old catalog] · New York, D. Van Nostrand · leaf 152
om it, by meansof a spindle through its centre. The fixed plate (Fig. 91) has, at opposite ends of a diameter, Chap. IV.] Electrical Machines. 133 two apertures or windows cut in the form of truncated sectorsof a circle. Below one and above the other are two sheetsof paper (BB\ the armatures, glued… … Fig. 91. The moving plate is an entire circle with a hole in thecentre for fixing the spindle, and, for mechanical reasons,having a diameter slightly less than that of the fixed plate. The plate is fixed with the two armatures at opposite ex-tremities of a horizontal diameter. Opposite to them, but…
Electricity
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