The elements of dynamic electricity and magnetism (1903)
Atkinson, Philip. [from old catalog] · New York, D. Van Nostrand company · leaf 163
This armature is about 2 inches long, \\inches wide at each end, f of an inch at the centre, and1 of an inch thick ; its sides concave, and its ends con-vex and slotted to correct the effects of residual mag- 146 DYNAMIC ELECTRICITY AND MAGNETISM. netism. A pointer, attached to its axis, indicates… … Fig. 57. being on a diagonal line between the lower left andupper right-hand corner of the instrument, and thepointer at zero on the left of the scale. But when thecurrent passes through the coils in either direction, thearmature rotates in obedience to the electromagneticforce, its longer axis…
Electricity · Magnetism
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