Coupe Iransversale 

 ]3arlabobiae a couraiit coutiiiu . 



Coujje UMusversale 

 parJa bobme a couraat alternaU'f 



Vueducole de 1' excUairice . 



C-fu _j 



jig 



Vue (ill cote de la Poulie 



Figure 88. — On facing page and above: Details of Gramme's self-excited alternator of 1880. 

 From Revue industrielle, February 1 1, 1880, pp. 56-57, pi. 3. 



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



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