412 Pedigreed Race of Paramcccium [Mar. 



3. There are normal minor rhythms of the rate of reproduction 

 of Paramcocium which are due to unknown intracellular phenomena.. 



4. The temperature coefficient of the average rate of multipli- 

 cation is approximately 2.70, and consequently the rate is influenced 

 by temperature at a velocity similar to that for a chemical reaction. 



5. There is a marked parallelism between the order of the tox- 

 icity of many cations toward Paramcuciiim and the ionic potentials 

 of the ions. 



6. Subjection to small amounts of alcohol increases the suscep- 

 tibihty of the organisms to copper sulphate. 



7. Excretion products of Paramdcium have a decidedly de- 

 pressing effect on its rate of reproduction. 



