CHAPTER XV. 



TELEPHONY. 



In the foregoing chapters I have described 

 the method of transmitting musical tones 

 telegraphically and its applications to mul- 

 tiple telegraphy, as well as to a mode of com- 

 municating with a moving railroad-train. As 

 I stated in a former chapter, after discovering 

 a method of transmitting harmony as well as 

 melody, I had in mind two lines of develop- 

 ment, one in the direction of multiple teleg- 

 raphy, and the other that of the transmission 

 of articulate speech. I will not attempt to 

 give the names of all the people who have con- 

 tributed to the development of the telephone 

 (as this alone would fill a volume) but only 

 describe my own share in the work leaving 

 history to give each one due credit for his 

 part. While I do not intend, here, to enter 

 into any controversy regarding the priority of 

 the invention of the telephone, I wish to say 

 that from the time I began my researches, in 

 the winter of 1873-4, until some time after I 

 had filed my specification for a speaking or 

 articulating telephone, in the winter of 1875- 

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