PETERS. — METABOLISM AND DIVISION IN PROTOZOA. 4G3 



Summari/ of Observations. 

 Stentor. 



22 0.05 Aq. 7.64 5.85 



22 0.0167 3.81 5.85 



The general results of the experiments described in this section are as 

 follows : 



1. Division in Stentor can be accelerated in rate and modified in 

 character by the presence of an excess of potassic chloride in an otherwise 

 normal medium. 



2. Division in Paramaecia can be accelerated by the presence of a 

 certain proportion of chloroform in an otherwise normal medium. 



3. Stentor and Paramaecia differ markedly in their division-reaction 

 when subjected to the same substances under similar conditions. In 

 other words, the two organisms are adjusted to different conditions. 



4. Practically the division-effects which are obtainable by the tempo- 

 rary application of a given concentration of a substance may be attained 

 by the continuous application of a more dilute solution of the same 

 substance. 



General Discussion. 



My subsequent experiments have given me an insight into the signifi- 

 cance of those just described which is different from what the preceding 

 description would seem to imply. 



