179 
of the combinations acid and salt and base and salt. 
He expresses this on page 323, as follows: 
“there is however one feature of fundamental impor- 
tance which is never obscured, and that is the antagoniom 
between the solvent actions of salts and acids and the 
additive nature of the combined solvent actions of salts 
and alkali”. 
One of the facts, which brought Hardy to this con- 
clusion, was, that with the dissolving of globulin in the 
presence of salt, the quantities of acid necessary varie- 
gated strongely with the nature of the salt, while the 
quantities of base changed very littie for the various salts. 
The concentration of the salts was rather different in these 
experiments. At first 1,5 cM.* normal salt solution, was 
added to 10 cM* globulin suspension, by which was 
formed a concentration of about 0,13 n. After that was 
added the required quantity of acid or base by which, 
especially in the most acid solutions the concentration of 
the salt was yet considerably diminished (0,06 n. or less). 
À similar result we obtained with the experiments on the 
conduct of Chlamydomonas in acelate solutions and malate 
solutions (from 0,01 molair), in which the H-ion-concen- 
tration regularly changed. We then observed that the 
limiting concentration for H-ions in the acid malate solutions 
had been considerably raised with regard to those in the 
acid acelate solutions. The limiting concentrations in the 
alkaline malate solutions had not removed with regard to 
those in the acelate solutions. Here we see another argu- 
ment for the different conduct of acid and salt and of base 
and salt with regard to the motility of Chlamydomonas 
and moreover once more the correspondence between the 
influence of electrolytes on the dissolving of globulins and 
on the motility of the organisms used by us. 
S0 far there was found a difference between the influence 
of electrolytes on the motility of Chlamydomonas and on 
