1877.] 



the Radicals of Electrolytes. 



223 



Distribution of the Positive Radical on the end of an insulated strip of metal 

 facing the Positive Electrode. 



For these experiments a 5-per-cent. solution of copper sulphate was 

 employed, and a glass trough 30 centimetres long by 13 centimetres 

 broad and 12 centimetres deep. In each experiment a strip of silver 

 plate about the thickness of writing-paper was placed lengthwise mid- 

 way between the electrodes, and allowed to remain immersed in the 

 electrolyzing fluid for one hour, the battery-power being 5 cells of Grove. 

 In experiments 1 and la the strips were similar, being 1 decimetre long 







J 



v 





10 cells 



—plate 1 1" 



cifliiv 



Ur 4- ^ 



^/TJarrtisKe-d. at ervcL 



— 







and 1 centimetre wide. In experiment 2 the strips were of the same 

 width, but 4 millims. longer, 2 millims. at each end being covered with 

 varnish, with the object of eliminating the action of the end surfaces. 

 Successive lengths of 2 millims. exactly were cut off after the action, and 

 the copper thereon was determined by the cyanide of potassium and am- 

 monia method. One centimetre of the cyanide solution was equivalent 

 to -00309 gram of copper. The results were as under : — 



Lengths of 2 millims. 

 commencing at the end 

 facing the + electrode. 



Cubic centimetres of KCy used. 



1. 



la. 



2. 



1. 



7-2 



7-3 



5-4 



2. 



5-0 



4-4 



4-2 



3. 



4-0 



36 



36 



4. 



3-1 



31 



2-8 



5. 



2-9 



2-4 



24 



6. 



21 



2-3 



2-3 



7. 



1-9 



1-8 



1-4 



8. 



1-6 



1-4 



13 



9. 



1-1 



1-2 



1-0 



10. 



0-6 



0-5 



0-6 



11. 



trace. 



00 



0-0 



