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INVENTIONS OF NIKOLA TESLA.

lias sixteen coils or eight free poles, will make one and a half turnsto the generator’s one. The motor y, with twelve coils or sixpoles, will rotate with twice the speed of the generator, and themotor z, with eight coils or four poles, will revolve three timesas fast as the generator. These multipolar motors have a peculi-arity which may be often utilized to great advantage. For ex-

ample, in the motor x, Fig. 32, the eight poles may be eitheralternately opposite or there may he at any given time alternatelytwo like and two opposite poles. This is readily attained bymaking the proper electrical connections. The effect of such achange, however, would be the same as reducing the number of