Cumming, Linnæus, b. 1843. [from old catalog] · New York, D. Van Nostrand · leaf 312
Ftg. 1 two opposite edges of the iron being north and south polarwhen the current is passing. The inner coil is furnishedwith a commutator, which reverses the current as soon as … Fig. 190. opposite poles of the inner and outer coils are opposed. Thegeneral appearance of the machine is shown (Fig. 190), inwhich A represents the outer coil of wires, B one pole of the 294 Electricity. [Book III. fixed electro-magnet made by them, and C the commutatingarrangement by which the…
Electricity
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