564 



If we represent these figures likewise graphically in the same 

 way as with the kations, then we obtain a number of closely 

 cramped curves from which appears, that with the same kation the 

 nature of the anion has only an unimportant influence (fig. 2). 



KCNS en KJ 



KCL, KBR en KNOj. 



Fig. 2. 



• In so far as we can still speak of a regular succession it appears 

 that CNS' and T retard the action of urease least, and SO"^ most. 

 Cr, Br', NO', lying between these, are so close to each other, that 

 the differences do not surpass the errors of observation. As has been 

 remarked before, we find at different colloid-chemical phenomena 

 the series CNS', I', Br', NO',, 01', SO",. 



The faculty of precipitating colloids rises e. g. in this succession. 



CNS' and SO", are here likewise the two extremes of the series, 

 whilst 1', Br', NO', and CI' lie between them. But as the differences 

 between CNS' and 1' and between Br', NO',, CI' are greater than at 

 the urease-retardation, it is possible to place them in a' definite 

 succession. 



The comparatively slight influence of the anions over against that 

 of the kations is likewise the reason, why in fig. 1 the concentra- 

 tions are indicated in grammolecules per Liter, whilst in fig. 2 at 

 K,SO, they are indicated in half grammolecules per Liter, consequently 

 as the normalities. 



[n the first case we have e.g. for NaCl and BaCl, ir is true, the 

 prejudice that the action of 1 Na' -\- 1 CI' is compared with that of 

 1 Ba" -[- 2 CI', but aftel- the unimportant influence of the anions was 

 proved by the 2"^ series of experiments, this seems to me to be 

 preferable to a comparison between 1 Na" -|- 1 Ci' and ^ / , Bsi" -]^ 1C\' , 

 which would be obtained from the comparison of normal solutions 

 instead of molar-solutions. 



In Fig. 2 on the contrary e.g. KCl and K,SO must be compared. 



