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continuous current. It was due to 

 Messrs. Gaulard and Gibbs that a system 

 of transformation from high to low pres- 

 sure was economical, and could be 

 adopted in central -station distribution. 

 If any one doubted the value of the work 

 done by those gentlemen, he would ask 

 what would be the present position of 

 electric lighting if Messrs. Gaulard and 

 Gibbs had not, during two or three years 

 of persistent opposition on the part of 

 electrical engineers, forced upon electri- 

 cians the conclusion that the use of their 

 secondary generators was an economical 

 mode of distributing electricity ? While 

 great credit was due to the author for 

 having introduced his theoretical views 

 on the question of alternators, it was 

 unfortunate that he had not given more 

 numerical facts as to alternating 

 dynamos, as to the efficiency of the 

 transformers, and so on. Such data 

 were very desirable. The author had 

 raised the question whether dynamos 

 ought to be worked in parallel or 

 separately. On the ordinary contin- 



