5 -C] CIRCLE DIAGRAM. '95 



In a like manner 



The last two terms are small and nearly cancel each other. 



35. Other methods of analysis may be employed for determining 

 the total voltage drop, and the form in which the results are ex- 

 pressed will vary according to the manner in which the various terms 

 are combined and the approximations which are introduced. In any 

 case some small and troublesome terms are introduced, which affect 

 the result very little and which do not enter in the determination of 

 " regulation," as defined by the Institute. The results are affected 

 less by these small terms than by variations in the value of R, depend- 

 ing upon whether, in its determination, load losses were included or 

 not, and whether steady temperature conditions were maintained 

 during the test. 



36. It might well be held that regulation should be so defined that 

 magnetising current should enter into its determination, particularly 

 since magnetising current has been much increased by the use of 

 improved iron worked at higher densities; on the other hand, it is 

 much simpler to define regulation independently of magnetizing cur- 

 rent and to specify the value of the magnetizing or exciting current 

 as a separate item. 



