re- power ona shuttle machiue; and while too expensive volves. These coils are wound in opposite direc- to compete with steam, it is far cheaper than foot tions on each section, so that both coils unite in power, and sure tofindfavorwith the seamstresses producing a north pole in one of the open… … tors is thus obviated. The brushes extensively as a source of power. are in pairs, and the shape of the The engraving, Fig. 8, represents commutator is such that one brush the motor in connection with a according to Mr. Griscom’s method, by putting three-fourths will always touch one-half of the…
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