120 



Trans. Acad. /Set. of St. Louis. 



possible cau be easily seen from the plot of x and y. See 

 fig. 7. 



Fig. 7 

 Design of Series Power Circuit for Constant Speed of Machines. 



Computed Data from Surface Constants. 



E^ = Total induced e. m. f. of dynamo at 1250 rev. pr. min. 

 E = Total induced e. m. f. of dynamo at 1400 rev. pr. min, 

 E.^ = Total induced e. m. f. of motor at 1000 rev. pr. min. 



A = 



.0070 



1 + 61 l+.004i 



B 



.0067 



1 + 6'i 1 +.0066 1 



% = percentage variation of motive speed when dynamo 

 speed is 1250 r. p. m. and R = 2.25 



