152 POWER DISTRIBUTION KOR ELECTRIC RAILROADS. 
containing four 750 k. w. generators. T'hese machines run 
at 300 r. p. m. and deliver current at about 8oo volts and 
FIG. 87. 
  
  
60 cycles per second. The armatures are built, like those 
of the Niagara generators, with several slots per phase per 
pole, so that the armature inductance is very low and the