168 



opportunity to test the results of the 

 theory in practice, and he supposed they 

 were the first people to see, so far as 

 it was possible by means of a dyna- 

 mometer to do so, a current in one 

 conductor at some distance from the 

 generating machine very much in excess 

 of its value at points near to and in 

 the machine itself. Not merely could 

 such a transformation in relative magni- 

 tude be effected, but the phase rela- 

 tion could be adjusted, thus giving the 

 method very wide applicability. For in- 

 stance, the two portions of the circuit 

 could have their phases thrown into quad- 

 rature with each other ; while the values 

 might be kept equal, which was the condi- 

 tion of things desirable in the Tesla 

 motor, now obtained, as Professor Ayrton 

 had said, by two circuits. 



Captain P. Cardew, K. E., said that in 

 the paper the reasoning was based upon 

 the usual assumption that the varying 

 quantities, magnetic induction, electro- 

 motive force, and current, followed the 

 sinusoidal curve. That was admittedly 



