BELGIAN RAILWAY TELEGPwVPH. 



commutator, by which he produces the pulsations of the current, 

 and puts the indicating hands upon the dials at s', as well as 

 upon his own in motion. These hands as usual, when properly 



Fig. 80. 



adjusted always point to the same letters. The transmitting 

 agent stops the handle B B' when he sees the hand F upon his 

 dial point successively to the letters which spell the word he 



37 



