175 
with distilled water is founded on a partial taking away 
of the absorbed salts and the different conduct of the 
algae from the various cultures is based on differences 
between the quantity and the nature of the substances 
absorbed by the plasmcolloïds. 
À phenomenon which should also be mentioned, crops 
up, when the objects are left for more than ten minutes 
in a solution, in which no amassing at the bottom takes 
place. Is the solution not too strong, the algae become 
movable again in course of time. This phenomenon may 
also be a result of absorbation processes, which have a 
slow course. However we shall not go further in to these 
contemplations; but we will point to the fact that here 
also we have to do with “condition phenomena”. 
$ 3 À conformity between the different influence ofthe 
combination acid and salt and of base and salt on 
the motility of Chlamydommas and the entering 
again into solution of globulins in acid 
and alkaline salt solutions. 
Now we shall discuss the graphical representation. Only 
the curve for potassium sulphate is about complete (see 
fig. 2). We see fromit that the course is very complicated. 
It strikes us at once, that the shape of the curve in the 
utmost acid solutions (from 0,00015 n. H,SO),) is quite 
different from that in most alkaline solutions (from 0,00100 
n. KOH). À course of the curve as in most alkaline solu- 
tions can arise when the influence of base and salt is 
additive. For the shape of the curve in the most acid 
solutions a similar supposition is not possible. Here it 
seems, as if the salt diminishes the influence of the acid, 
while, on the contrary the H-ions also diminish the influence 
of the salt. When, namely, we follow the curve from the 
