Anderson. — Electrical Deposition of Nickel. 



505 



(6.) Two equivalents of ammonium nitrate 

 (fig- 3) 



Ttrrfe in hours 



Time in hours 



3. Kate of deposition : The rate of deposition of the nickel was found 

 to be enormously affected by the addition of ammonium nitrate. The 

 following typical values may be given from a number of closely agreeing 

 experiments where one, two, and three equivalents of nitrate were added 

 to the solution : — 



(a.) One equivalent of ammonium nitrate 

 (fig- 4, c) 



(/>.) Two equivalents of ammonium nitrate 

 (fig- 5, «) 



(a) Three equivalents of ammonium nitrate 

 (fig- 5, b) 



Time. 



Hours. 

 | 1 



I 2 

 - 3 



4 



1 5 



2 

 4 

 5 

 6 



3 



4 

 11 

 12 



Amount 

 deposited. 

 Grammes. 

 0-0065 

 0-0382 

 0-2234 

 0-2861 

 0-3050 



0-0061 

 0-0153 

 0-0813 



0-2748 



0055 

 0-0063 

 0-1469 



0-2738 



