264 



ci^ark: reduction potentials 



TABLE 4 

 Reduction of Indigo by Titanium at Pu 4-55 

 Indigo and Titanium about 0.003 ^ 

 Buffer Solution: N/io Citrate with HCl 



TABLE 5 



Reduction of Indigo by Titanium at P^ 6.69 



Indigo and Titanium about 0.003 ^ 



Buffer Solution: M/io NaaHPO, lf/40 Citrate with HCl 



