Transmission of Musical Sounds. 



231 



wire, which I found it convenient to make in the original form 

 of the experiment, for the sake of portability and facility of 

 removal ; but, if the apparatus be intended as a fixture, it will 

 be easier and better to employ but one length of wire. The 

 wire consisted of four portions : the first part touched the 

 sounding-board of the piano-forte, and reached half-way to 

 the floor; the second passed through the insulating-tube in 

 the floor, and terminated when it reached the ceiling of the 



VOL. 1 1. 



Nov. 1831. 



