loo ELECTRIC LIGHTING. 



to any required degree. For this purpose pieces of iron, 

 movable in a kind of groove, have been adapted to the poles, 

 and can be fixed at a greater or less distance from the wires 

 of the magnetic pinion. Secondly, the collector is placed 

 apart from the axis of rotation, so that the machine may be 

 covered up and protected, and in order to accomplish this it 

 was necessary to make the communications through the axis 

 of rotation, and the contacts of the collector have been so 

 arranged as to enclose it on the two sides of the axle under 

 a pressure produced by a counterpoise P. The rubbing parts 

 themselves are made of an alloy of lead and zinc, and fitted 

 to elastic metallic supports. 



MACHINES WITH ALTERNATE REVERSIONS OF THE CURRENTS, 

 ESPECIALLY APPLICABLE TO THE DIVISION OF THE ELEC- 

 TRIC LIGHT. 



For a long time it was a matter for complaint that the 

 generators of the electric light could supply only a very 

 limited number of lights, and the desideratum generally re- 

 quired was the construction of a generator capable of furnish- 

 ing electricity to several derived circuits in quantity sufficient 

 to maintain lights in different places. Although several com. 

 binations for solving this problem were long ago proposed, it 

 is only recently that the solution has been accomplished in 

 a satisfactory manner, both as regards the generator and as 

 regards the lights themselves, and we are indebted to Lontin 

 for this important novelty. 



tonl in's System. Lontin's machine for the production 

 of light succeeded not only in dividing the electric light, but 



