148 



was arranged with an electric- control 

 governor, which was compounded so as to 

 keep the electromotive force at the 

 terminals constant at all loads. Though 

 the machine revolved at a high rate of 

 speed, the wear and tear was exceedingly 

 small, the same bearings having been 

 running for three years without any per- 

 ceptible wear. 



Mr. W. B. Esson observed that most 

 of the points he might have referred to 

 had been taken up by other speakers. 

 The induction-curve in the Mordey alter- 

 nator would differ considerably from the 

 curves shown by Mr. Atkinson, for two 

 or three reasons. The first was that the 

 coil in the alternator was not merely a 

 rectangle concentrated in one wire, as 

 would be required to give the particular 

 curve in 2, but a number of wires occupy- 

 ing a considerable angular width. An- 

 other reason was that, owing to the 

 trapezoidal form of coil, the induction 

 commenced very gradually, and rounded 

 off the corners in the diagram. The 

 peculiarity of that alternator was that the 



