120 



Trans. Acad. Sci. of St. Louis. 



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



fig. 7. 



.0036 



.0040 



.0045 



.0050 



.0055 



0060 



E = 

 E, = 



Fig. 7 

 Design of Series Power Circuit for Constant Speed of Macbines. 



Computed Data from Surface Constants. 



Total induced e. m. f. of dynamo at 1250 rev. pr. min, 

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

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



A = 



a 



.0070 



1 + b\" l+.004i 



B = 



a' 



.0067 



l+b"\ l+.0066i 



% = percentage variation of motive speed when dynamo 

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



