Figure 8i. — Drawing of the Jablochkoff candle, candle holder, and onyx 

 globe. As each candle was consumed, another of the four candles in the 

 base was manually switched into position. From Review induslrielle, June 5, 

 1878, p. 223. 



^^f.^U \l^ 



transformers (fig. 82) in the circuit, but he found no 

 definite advantages."" The primaries of the trans- 

 formers were strung in series in the circuit of the 

 generator and the "candles" were similarly placed in 

 series in the secondaries of the various transformers. 

 The Jablochkoff "candle" made possible the first 

 electric illumination on a broad commercial scale. 



"" L. Denayrouze and P. Jablochkoff, "Divisibilite de la 

 lumiere electrique," Comples rendus, 1877, vol. 84, pp. 750-752; 

 P. Jablochkoff, "Application des bouteilles de Leyde de 

 grande surface pour distribuer en plusieurs points Teffet du 

 courant d'une source unique d'electricite avec renforcement 

 de cet effet," Comptes rendus, 1877, vol. 85, pp. 1098-110; 

 Bridsh patent 1996 (May 22, 1877); French patent 120684 

 (October 11, 1877; addidon, October 12, 1878); Engineering, 

 1881, vol. 32, p. 391. 



Figure 82. — Circuit diagram showing how 

 Jablochkoff used transformers for the sub- 

 division of his electric lights. From Engi- 

 neering, October 14, 1881, vol. 32, p. 391. 



396 



BULLETIN 228: CONTRIBUTIONS FROM THE MUSEUM OF HISTORY AND TECHNOLOGY 



