The elements of dynamic electricity and magnetism (1903)
Atkinson, Philip. [from old catalog] · New York, D. Van Nostrand company · leaf 185
s proportionally increased. Wildes Machine.—Wildes improvement consisted insubstituting a pair of electromagnets for the steel mag-net to produce the magnetic field, and exciting them by Fig. 68. l68 DYNAMIC ELECTRICITY AND MAGNETISM. a small Siemens machine, mounted above it as shown inFig. 69 ;… … Fig. 69. passed out through the external circuit, being madedirect by commutation in both machines. The pole-pieces referred to are indicated in the cut hy m n aboveand T T below, and insulated from each other by brassindicated by o and i. The Dynamo.—Iron when magnetized always retainsa little…
Electricity · Magnetism
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