1894] 



Current to Earth, 



101 



In 2 hours and 10 minutes after connexion the wire connected to 

 the mains was so far eaten through that it dropped off, while that 

 connected to the water-pipe earth was visibly thickened by a deposit 

 of copper. The gauge of the wires before and after this experiment 

 was approximately as follows : - 



Original gauge of each 0'005 inch. 



Gauge of anode after experiment. . . . 0'002 ' 

 Ditto of kathode 0-0069 ,7 



The connexions are shown in fig. 2^ where V is the voltameter cell, 

 a the wire which acted as anode, k that which acted as kathode. 



FIG. 2. 



On the 2nd May, 1894, some further tests were taken. 

 In the first place a connexion to the opposite main was substituted 

 for the connexion to the water-pipe, as shown in fig. 3. 



FIG. 3. 



This connection gave a deflection of about 235 to either side, 

 according to the direction of the battery E.M.F., and absolutely no 

 deflection without the battery. 



