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



Zinc and nearly pure saturated zinc sulphate (16° C). Zinc negative 





to liquid. 





Zero. 



Heading. 



Deflection. 



1091 -0 



1104 7 



13 7 



88 -6 



1075 -0 



13-6 



87 -5 



1100 '2 



12 7 



OD / 



±\J 1 O O 



1Q .t) 



QO -7 





-Li) O 





nop) -2 







Cleaned zinc strip. 





91 '8 



1075 1 



16 7 



91 '0 



1105 -0 



14 -0 



90 -1 



1072 -1 



18 -0 



90 -3 



1104 -0 



13 7 



Mean 14 -61 or "358 volt. 



In the first four reversals the distance was a little too great. 



Copper and nearly pure saturated zinc sulphate (16° C). Copper 





negative to liquid. 





Zero. 



Reading. 



Deflectic 



1079 -2 



1075 -2 



4-0 



78 -2 



80 -2 



2-0 



78 7 



74 -5 



4*2 



79 -2 



83 -2 



4-9 



80 -5 



74 -8 



5 7 



80 '0 



84 -5 



4-5 



80 -0 



74 -1 



5-9 



82-0 



86 -0 



4-0 



81 "8 



74 -6 



7-2 



81 -2 



85 -8 



4-6 



Mean. 



4 -61 or -113 volt. 



Copper and distilled water (16° C). Copper is positive to liquid. 

 Zero. Eeading. Deflection. 



1083 -1 1081 -0 2 -1 



82 -8 86 -0 3 -2 



82 -9 79 -6 3 -3 



