208 



Profs. W. E. Ayrton and John Perry. [Mar. 21, 



Zinc and copper connected by distilled water at 10° C, Zinc negative 



to copper. 



Zero. Beading. Deflection. 



1040 1033-1 6-9 



40 49-0 9-0 



39 -9 32 -1 7 -8 



39- 8 47-2 7-4 

 39 -3 32 -1 7 '2 



39 -2 50 -0 10 -8 



40 -8 32 -9 7 '9 

 40 -2 50 I 9 -9 



40- 31-2 8*8 

 39 -8 51 -0 11 -2 

 42 1 32 -3 10 -1 

 42-0 52 1 • 10-1 



Mean 8*9 



Mean of first eight obs. ........ 8 '4 



Mean of last eight obs. .......... 9 *5 



The same after two hours without zinc being cleaned. 

 Zero. Reading. Deflection . 



1037 -0 1027 -0 10 -0 



37 -0 48 -1 11 -1 



37 -0 25 -2 11 -8 



36 -9 47 -6 10 -7 

 35 -8 25 -0 10 -8 



35 -0 46 '4 11 -4 



Mean. 11 '0 



Zinc and copper connected by distilled water at 45° 0. cooling during 

 experiment to 20° C. Zinc negative to copper. 



Zero. Beading. Deflection. 



1037 -2 1054 -0 16 -8 



37 -1 21 -5 15 -6 

 37 -1 51 -2 14 T 

 37 -1 22 -8 14 -3 

 37 -2 49 -2 12 '0 



37 -0 54 -0 17 -0 



36 -8 20 -2 16 -6 

 35 -2 51 -0 15 -8 



Mean 15 "3 



In the experiments of Table VI the liquids were contained in small 

 flat vessels which were placed below the metal plates near the middle 



