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Also I have discovered that a telegraphic message may be 

 sent by means of using musical notes. Some of these 

 discoveries which I have described were made simultane- 

 ously by three persons : Ward of Chicago, Lecourt, and 

 myself. 



All the entanglements of sound come through the air. 

 We perceive all the varyiug tones, etc., without difficulty. 

 Prof. Wheatstone and afterwards Prof. Henry demon- 

 strated the fact that a solid substance, tor instance a wooden 

 rod or bar, would conduct an infinite number of vibrations 

 simultaneously. Pianos on the opposite sides of a street 

 ma}^ thus be made to answer to each other. The same 

 eflect may be produced in a wire also by the use of the 

 battery. You can send as many musical notes as you 

 please along a wire by using the means I have described. 



I shall ask INIr. AVatson to send two sounds at once. 

 [One sound heard.] The notes are not simultaneous. 

 The trouble is Mr. Watson is repeating the tirst experi- 

 ment, through my mistake in sending the wrong signal. 



[An intermittent current was then sent from Boston 

 by Mr. Thomas A. Watson, Professor Bell's associate. 

 This caused a noise from the telejihone very similar to 

 that of a horn. The Morse telegraph alphabet was then 

 sent by musical sounds, and could be heard throughout 

 the hall. The audience burst into loud applause at this 

 experiment. A telephom'c oi-gan was then put into oper- 

 ation in Boston. "Should xVuld Acquaintance be Forgot," 

 "America," and "Yankee Doodle" were readily heard 

 through the hall and heartily recognized. At this point 

 Prof. Bell then explained how he learned to transmit the 

 tones of the human voice, and paid a grateful tribute to 

 Mr. Watson. Prof. Bell asked Mr. Watson for a song, 

 and "xVuld Lang Syne" came from the mouthpiece of the 

 instrument almost before his words w^ere ended. Mr. 



