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THE DEVELOPMENT OF 



ELECTRICAL TECHNOLOGY 



IN THE 19111 CENTURY: 



MUS. COMP. ZOOL. 

 LIBRARY 



APR 1 6 1963 



HARVARD 

 UNIVERSITY 



2. The Telegraph and the Telephone 



hy W. James King 









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Paper 29, pages 273-332, from 



CONTRIBUTIONS FROM THE MUSEUM 

 OF HISTORY AND TECHNOLOGY 



United States National Museum 



bulletin 228 



SMITHSONIAN INSTITUTION 



WASHINGTON, D.C., 1962 



