■ fi38 



available decrement of an electric circuit is about 0,01 and that, in 

 most cases tiiis value is higher. The decrements of all the receiving 

 apparatus known to ns, which mechanically register the signals are 

 larger than that of the string galvanometer. 



However it is only possible to profit fully by a small decrement. 



B 



Fig. 3. 



when signalling is excessively slow. Signals coming in at the usual 

 speed would be intermingled if the vibrations of the string died 

 away so slowly. Therefore it is necessary to increase the decrement 



