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There might be a more efficient machine, 

 but there was mechanical flimsiness. A 

 great deal had been said about hysteresis. 

 He considered the author's inductions 

 from Professor E wing's paper were faulty. 

 Plotting out the curve from that paper, 

 or from Dr. Hopkinson's paper, it would 

 be found that up to an induction of 

 about 10,000, the power spent with a 

 given alternation frequency varied sensi- 

 bly as the induction. The author's 

 argument, that if there was half the 

 induction there was half the heat per 

 cubic centimeter, was all very well, but 

 then twice the iron must be used to get 

 the same output. And it was found that 

 in transformers made according to pres- 

 ent practice with low inductions, in which 

 most of the heat was wasted in the iron, 

 as it was in transformers of any reason- 

 able size, the speed of alternation made 

 very little difference theoretically in the 

 output. He said theoretically, because 

 not enough was known about the time 

 lag, and if that was great, larger outputs 

 could be obtained with few alternations. 



