Notes on electricity and magnetism. designed as a companion to Silvanus P. Thompson's Elementary lessons (1891)
Murdock, J. B. (Joseph Ballard), 1851-1931, Thomson, Silvanus Phillips, 1851-1916 · New York, Macmillan & Co. · leaf 123
ent renders it well adapted for incandescentlighting. 73. The Brush Machine (§411). This machine has received its main development in theUnited States, but is now extensively used throughout theworld. It contains many peculiar features, and is distinct-ly a separate type, although frequently… … ELECTRICITY AND MAGNETISM. HI the four field magnets, which are placed so that the arma-ture coils pass between similar poles. The magnets areoval in cross section, and are furnished with large polepieces, approaching very closely on each side to the arma-ture. The armature is a solt iron disc,…
Electricity · Magnetism
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