90 
of magnesium, beryllium, and ferric chlorides was investigated. The 
choice of such salts is limited by the condition, that only salts of 
such cations can be used, whose ovalates are easily soluble. For in 
the case of only slight solubility of those oxalates, a part of tie 
cation added would gradually be removed from the solution by 
precipitation with the potasstum oxalate set free during the reaction. 
However, these investigations may be extended eventually by the 
use of ammonium, rubidium, and caesium salts, while, on the other 
hand, a wide variation of all kinds of anions wil be possible 
here. 
In all experiments the same volume of solution (50 cem) was used, 
containing 0,0607 grammol. of the (anhydrous) complex salt per 
Liter. Moreover, the whole experimental arrangement was in all 
cases accurately the same, while the time of exposure was always 
Souentiye oh Ue Complex Salt 
decomprsed abten OY minutes 
m 
204: 
CD 
sf CS 
20; \ 
15 
10% 
$ 
e Concentration of the Cerobyles 
_ 025:050 O25 ts 20 25 3.0 35 40 ol. i . pik y, 
