lo Newbery, Recent Work on Overvoltage. 



Cathodic Metal Overvoltages in Solutions of Metallic 



Chlorides. 



Anodic Metal Overvoltages in Solutions of Metallic 



Sulphates. 



400 



1.85^ 



1.85 



1.73 



1.72 



1.69 



1.70 



0.08 



0.07 



* Metal became passive. 



t In nickel ammonium sulphate solution. 



Anodic Metal Overvoltages in Solutions of Metallic 



Nitrates. 



* Metal became passive. 



