Thin Metal Partition in a Voltameter. 



187 



(b) For measuring the ohmic resistance of the voltameter, 

 Kohlrausclr's method with induction-coil and electrodyna- 

 moineter was used. The connexions for this measurement 



Fig. 1. 



B = battery of storage-cells. 



V = voltameter, with partition, a. 



C = commutator. 



G- = galvanometer, with key, k, to close circuit. 



E, = auxiliary resistance in the main circuit. 



r x = resistance to which the galvanometer circuit is shunt. 



p = auxiliary resistance in galvanometer circuit, =1010 ohms. 



r 2 = total „ „ „ „ =1100 „ 



I = main current in amperes. 



i x and i 2 = currents in the respective branches. 



v = ohmic resistance of the voltameter. 



r„ == resistance of connexions. 



Fig. 2. 



B = battery. 



= commutator. 



1 = induction-coil. 



E = electrodynamometer, with key, k, in movable coil-circuit. 

 R= P.O. box. 

 V = voltameter. 



