MACHINES WITH ALTERNATE REVERSIONS. 107 



10 per cent, when, instead of enamelled globes, globes of 

 wickered or waved glass are used. 



Siemens' System. Siemens' machines for dividing the 

 light with reversions of currents, which are represented in 



FIG. 35. 



Fig. 35, have been constructed for 4, for 8, and for 16 lights. 

 They are, however, also based on the principle of Lontin's 

 system, but under different conditions, and taking advantage 

 of the dynamo-electric effects of the same maker. They 

 require, it is said, a motive force not exceeding 13 horse- 

 power. If we take, for instance, the form of the machine 

 adapted for 16 candles, we observe that the inducing system, 

 instead of being mobile, as in the systems of Lontin and in 



