DEVELOPMENT OF THE TELEGRAPH 



instead of the balls, suspend a range of bells from the 

 roof, equal in number to the letters of the alphabet; 

 gradually decreasing in size from the bell A to Z; and 

 from the horizontal wires let there be another set reach- 

 ing to the several bells; one, viz., from the horizontal 

 wire A to the bell A, another from the horizontal wire B 

 to the bell B, etc. Then let him who begins the dis- 

 course bring the wires in contact with the barrel, as 

 before; and the electrical spark, breaking on bells of 

 different size, will inform his correspondent by the sound 

 what wires have been touched. And thus, by some 

 practice, they may come to understand the language of 

 the chimes in whole words, without being put to the 

 trouble of noting down every letter. 



"The same thing may be otherwise effected. Let the 

 balls be suspended over the characters as before, but 

 instead of bringing the ends of the horizontal wires in 

 contact with the barrel, let a second set reach from the 

 electrified cake, so as to be in contact with the horizontal 

 ones; and let it be so contrived, at the same time, that 

 any of them may be removed from its corresponding 

 horizontal by the slightest touch, and may bring itself 

 again into contact when left at liberty. This may be 

 done by the help of a small spring and slider, or twenty 

 other methods, which the least ingenuity will discover. 

 In this way the characters will always adhere to the 

 balls, excepting when any one of these secondaries is 

 removed from contact with its horizontal, and then the 

 letter at the other end of the horizontal will immediately 

 drop from its ball. But I mention this only by way of 

 variety. 



