March 8, 1889.] 



SCIENCE. 



C. & C. ELECTRIC MOTOR COMPANY. 



Electric Motors 



FOR 



Arc and Incandescent Cir- 

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 Motors Designed for all 

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OFFICE and MANUFACTORY: 



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Philadelphia Office, 301 Arch St, 



Western Office, 139-141 Adams Street, 



Chicago- 

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THE 



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COMPANY. 



98 MILK ST,, BOSTON, MASS. 



Tliis Company owds tlie Letters 

 Patent granted to Alexander Gra- 

 ham Bell, March 7th, 1876, No. 

 174,465, and January 30, 1877, 

 No. 186,7§7. 



The Transmission of Speech by 

 all known forms of ELECTRIC 

 SPEAKING TELEPHONES in- 

 fringes the right secured to this 

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 renders each individual user of tel- 

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