i 9 4 



ELECTRIC LIGHTING. 



mention the lamps of Regnard, Hiram Maxim, H. Fontaine, 

 Marcus, Crompton, Hackley, Krupp or rather Dornfeld, 

 Chertemps, &c. This last is little more than Archereau's 

 regulator improved, but it has the advantage of being cheap 



and of working in a tolerably 

 steady manner. It was shown 

 at the Exposition of 1878, and 

 we give a representation of it in 

 Fig. 49. 



Dornfeld's system resembles 

 Biirgin's, that of Hackley is like 

 Van Malderen's. Crompton's 

 lamp is only a Serrin regulator, 

 in which the carbons may be 

 placed above or below the case 

 containing the mechanism, and 

 thanks to this arrangement the 

 lamp can simultaneously give 

 two luminous points. Finally, H. 

 Fontaine's and Hiram Maxim's 

 lamps much resemble Serrin's 

 lamp, but have their electro-mag- 

 netic systems a little different. 

 These last two apparatus are re- 

 presented and described in the 

 new edition of Fontaine's book, 

 as is also that of Marcus, which 

 FlG 49 is very like Gaiffe's. Regnard's 



lamp is only a complication of 



De Baillache's, and makes use of very slender carbons, and 

 is therefore of little practical application. 



