66 McBAIN [1904 Tower 



of analysis, t. e., 0.00092 of HgSO^ for normal and half normal 

 acid, and o.ooo5g for more dilute solutions. 



HjSO, 



The author considers the following to be the most trustworthy 

 results; but thinks that .1764 for njio acid at 20° is '*for some 

 unaccountable reason " too low. 



The author summarized his results with dilute solutions in the 



formula : 



«, = 0.1788 + o.ooii{t — 20) 



1905. R. Luther und B. Krsnjavi. 



Ueber komplexe Verbindungen der Kohlensiiure mit Schwermetallen. Zeit. 

 anorg. Chein., 46, 170. 



Solutions of cupric (sulphate), ferric, or uranyl salts in excess 

 of alkali bicarbonate solution were placed in the bottom of a 

 U-tube, both branches of which were filled with potassium 

 bicarbonate solution ; on passing through an electric current 

 the colored zone moved toward the anode (slowly, at least in 

 the case of the cupric compound). Taken in conjunction with 

 the observation that these bodies diffuse through parchment, 

 this shows the presence of the metals in the complex anions. 



