ALTERNATING GENERATORS AND SYNCHRONOUS MOTORS. 
(see Pars. 427 and 428) to its normal or synchronous 
speed, and the machine excited as follows: 
1. Close the switch S,. 
2. Regulate the excitation by means of the rheostat 
f,, till the voltmeter, V,, indicates the same volts as 
the voltmeter V,; that is, the voltage on the motor 
armature should be the same as that on the line. 
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Fic, 93.—CONNECTION DIAGRAM FOR SYNCHRONOUS MorTor. 
3. Connect the motor armature to the line as follows: 
First close the circuit of the two lamps L, and L, which 
constitute the synchronizing device, and regulate the 
speed of the motor, if necessary, until the pulsations of 
the lamps become longer and longer; then close the switch 
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