Kinsley — Discussion of Series Dynamo- Electric Machines. 117 



E 2 . bE 



(16) 



ad a 



n = 0.00505 E 2 + 0.572 E 



See fig. 5 QS, 



Equations (14), (15) and (16) are the equations of the pro- 

 jections upon the co-ordinate planes of a line on the surface. 



See fig. 5 OT. 



These curves are decidedly interesting ones, but they will 

 not be discussed at present. 



Fig. 6 



ice. Resis 

 and Resistance Equal to 7.9 Ohms. 



Series Dynamo Surf ace. Resistance Equal to 7 Ohms 

 ' to 7.9 Ohi 



It is important to know how speed, electromotive-force, 

 and current will vary with reference to each other if the 

 circuit is kept constant. 



(11) 



Then R = a constant. Let R = 7 

 E = Ri = 7 i 



