THE CONTINUOUS CURRENT GENERATOR 



107 



reason the rheostat wire is made larger on the first steps 

 than on the last steps. The amount of taper is generally 



FIG. 64. Front View of a Field Rheostat. Ward Leonard Co. 



FIG. 60. Back View of a Field Rheostat. Ward Leonard Co. 



2:1, i.e., the rheostat can safely carry twice as much current 

 on one end as on the other. 



