Manchester Meiywirs, Vol. liv. (1910), No. 13 



5 



discomfort to the subject under test. The voltage was 

 measured by a standardised voltmeter V, and the current 

 by a standardised milliammeter A, the latter so placed in 

 the circuit that it did not include the voltmeter current. 

 A reversing switch was employed in order that the 

 current could be sent from the right to the left hand or 

 the reverse, as required. 



Table Ia. 

 Experiments zvith Wet Cotton Ropes. 



Measurement with Alternating Currents. For this 

 purpose a Kohlrausch Bridge with telephone, made by 

 Hartmann and Braun, was found suitable. The alternating 

 current was supplied either by a small induction coil I.C., 

 or by a small alternator marked ~. 



A throw-over switch enabled either of these methods 

 to be used at will. 



