124 



was as convenient as to put the self-in- 

 duction into the machine itself. Still, 

 there was a good deal to be said in favor 

 of machines of iron. One advantage was 

 that the clearance between the poles and 

 the armature was smaller, and there- 

 Figs. 27 



&D 



Single-Coil Alternatob. 

 Scale A . 



fore the magnetization could be got at a 

 cheaper rate. One of the great advances 

 in alternators of late years was the in- 

 vention of the Mordey machine. Up to 

 that time alternate-current machines were 



