58 



sented to carry out an independent series 

 of experiments, at the works of the 

 Maschinenfabrik Oerlikon, in Switzer- 

 land, the electrical department of which 

 is under his charge. The experiments 

 were made as follows: The alternator 

 was driven at its normal speed of 600 

 revolutions per minute by a steam engine, 

 and its terminals were connected with a 



Fig. II 



a 



transformer wound to reduce the press- 

 ure in the ratio of 20 to 1. The pn 

 ure on the secondary terminals of the 

 transformer was measured by one of Sir 

 William Thomson's balances, specially 

 made for alternate-current work. The 



