2 68 



CLARK: REDUCTION POTENTlAIvS 



TABLE lo 



Reduction of Methylene Blue by Titanium at P^ 4.55 



Methylene Blue and Titanium about 0.003 ^ 



Buffer Solution: M/io Citrate with HCl 



TABLE II 



Reduction op Methylene Blue by Titanium at Ph 6.69 



Buffer Solution: M/io Na2HP04, ilf/40 Citrate with HCl 



Methylene white precipitate formed. 

 Potentials unsteady. 



