185 
with a different H-ion concentration is only acceptable, 
when the supposed plasmcolloïds behave towards salts as 
suspensoïd colloïds. The suspensoïd properties of the 
plasmcolloïds of Chlamydomonas come to light by the 
influence of small salt concentrations. In our experiments 
were necessary very small quantities of phosphate to 
make the organisms immovable. The highest concentrations 
were required for Ca(NO;);, namely 0,40 n. With binair 
salts the concentrations asked for, were from 0,10 n. to 
0,20 normal. From these data appears the influence of 
the valence of the ions. 
The plurivalent anions of the phosfate required the 
lowest concentrations, the pluvalent cation of the calcium 
nitrate the highest concentration. 
The influence of the valence of the ions also points to 
suspensoïd properties. For the case, that there was a 
greater agreement between the phenomena by Chlamy- 
domonas and the salting out of emulsoïds, the anions and 
the cations of the salts, should exercise more or less 
influence according to a fixed order. The anions and the 
cations form, as regards their influence series. For the 
anions the series (the series of Hofmeister) is as follows: 
DO acetate CINCIO NO; Br]; ENS: 
In order to examine whether the influence of the salts 
on the motility of Chlamydomonas decreased or increased 
according to this series, experiments were done in KCI, 
KNO;, KBr, KJ and KCNS. AI these experiments were 
done with individuals of Chlamydomonas from one cul- 
ture. The following order was stated: 
PINOE CLEBEIENS: 
It is clear that this order is not at all like that in 
Hofmeister's series Meanwbhile this result does not 
prove much. The series of the ions show a subverse 
order, when the milieu becomes of alcaline acid. In neutral 
solutions we get transition-series, in which the order is 
