ÖFVERSIGT AF K. VETENSK.-AKAD. FÖRHANDLINGAR 1 8 94, NIO 2. 49 



Soraetimes organic acids such as H2O2C2O2 are used. These are 

 generally oxidated to CO^ by the current, and thus hydrogen is 

 prevented being liherated at the same time as the acid is not 

 strong enough to corrode the deposit. 



Glassen ^) recommends the use of this acid for all metals when 

 electrolysing for analyctical purposes; for metals, which according 

 to our experiment are less positive than hydrogen his handbook. 

 contains however receipes prescribing electrolytes consisting of 

 unorganic salts in acidulated solutions. 



From what has been said it is evident, that the two classes 

 are very different from each other. and that this diversity, existing 

 by reason of their different relations to electro-deposited hydrogen, 

 fuily Warrants the Classification. 



Stockholm and Royal Technical College, January 20th 1894. 



') Glassen, Elektrolyse 1893. D. R. P. N:r 17864, Klasse 48; Vögei, und 

 RössiNG, Handbuch der Elektrochemie 1891, s. 51. 



