104 ELECTRIC LIGHTING. 



is connected with the contact itself, while the other com- 

 municates with a hand circuit-breaker, i. The former receives 

 the wire of the corresponding magnetic system, the latter 

 the wire which leads to the electric lamp. Moreover, the 

 various contacts are themselves provided with handles, which 

 connect them two by two and enable an instantaneous union 

 or separation of the partial currents to be made. 



This machine has for some time been applied to the light- 

 ing of the terminus of the Lyons railways, where it supplies 

 31 electric lights. These lights are produced by a single 

 electric generator and from two induced systems of 25 coils 

 each. By joining these coils together, and interposing in 

 each of their circuits several electric light regulators on the 

 Lontin system, it has been found possible, by a combination 

 of the coils suitable to the length of the circuit, to carry to 

 31, as I have said, the number of illuminated points, each 

 equal to nearly 40 Carcel lamps. 



For six months these machines have been established at 

 the terminus of the Chemins de Fer de POnest (Saint-Lazare 

 station), where they supply 1 2 lights, two of which, placed at 

 the entrance to the station, are 700 metres from the machine, 

 a fact that triumphantly replies to the objection made by 

 some persons to the use of alternately reversed currents, 

 which, according to them, would be incapable of producing 

 light at a greater distance than 200 metres. 



Gramme's System, This system' is merely a modifica- 

 tion of the foregoing, only the induced apparatus is formed 

 of a rather long iron cylinder fixed horizontally, as shown in 

 Fig. 34, and otherwise arranged like the ring in the same in- 

 ventor's machines. All the small coils, however, A A, which 

 surround this cylinder, instead of being attached to a col- 

 lector, are distributed in four separate series, each connected 

 with a particular circuit, so that they successively supply the 

 current to four different circuits. The inducing system is a 

 kind of magnetic pinion formed of eigjit straight electro- 



