Kinsley — Discussion of Series Dynamo -Electric Machines. 121 

 i E E, E, E,+ Ri A B % 



20 

 40 

 60 

 80 

 100 

 120 



181.5 

 338.0 

 474.0 

 594.0 

 700.0 

 795.0 



118.0 

 212.0 

 288.0 

 351.0 

 404.0 

 447.0 



167.0 

 302.0 

 423.0 

 530.0 

 625.0 

 710.0 



a 



163.0 

 302.0 

 423.0 

 531.0 

 629.0 

 717.0 



.00648 

 .00605 

 .00565 

 .00530 

 .00500 

 .00473 



.00590 

 .00530 

 .00480 

 .00439 

 .00404 

 .00372 



+ 2.5 

 0.0 

 0.0 

 —0.2 

 —0.5 

 — 1.0 



The values of ., , . • and ^ , ^,- given on page 121 are 

 plotted. See fig. 7. 



As is seen a straight line averages the points very fairly 

 from i = 110 to i = 30. 



Fig. 8 



Series Dynamo Surface and Moter Characteristic. 

 Design of Power Circuit. 



From the line we find that 



(20) ^='^^ (21) 



— = 0.00179 

 n 



