Fig.2 . Coupe b-ansversale et Pi-ofil. 



gramme li cawaats alter nntifs noaveoM.. 



I 



^ 

 ^ 



Figure 86. — On facing page and above: Gramme's alternator of 1878 for a 4-circuit JablochkoflF 

 candle system, with four candles per circuit. The current for the rotating field was supplied 

 by a separate type d'atelier e.xciter. From Revue industrielle, June 5, 1878, pp. 226-227, pl- I2- 



Figure 87. — Gramme's self-e.xcited alternator 

 (1880) for the Jablochkoff candle system. 

 From Revue industrielle, February 11, 1880, 

 P- 53- 





PAPER 30: DEVELOPMENT OF ELECTRICAL TECHNOLOGY IN THE 19TH CENTURY: 



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401 



