Kinsley — Discussion of Series Dynamo-Electric Machines. 131 



line was then platted showing the relation between u^ and i, 

 the values of Uj determined from the line, from readings of i, 

 would differ from the true Uj by not more than \%. 



The equation of the line of fig. 16 is 



- + - E = nj 

 a a 



When E = a constant = 12.23 



5 + 35.85-= 18.00 

 a 



See p. 118. 



5 + 48.10 - = 22.00 

 a a 



a = 1.945 



6 = 0.635 



from fig. 16. 



1.00 



2.00 



4.00 



3.00 



Fig. 17 



Series Dynamo Surface, Effect of "Varying the Speed 

 when the Resistance is Constant. 



It will thus be possible to determine this relation between 

 n^ i, and E by any one of the ways given with as great 

 accuracy as the instrument may be read. 



