PETERS, — METABOLISM AND DIVISION IN PROTOZOA. 471 



destructive maximum of concentration. Tlie following experiments were 

 made to determine the same point for calcic chloride : 



Series 5. Expt. No. 57, Apr. 17, 1902. 



(All Stentors originated from culture No. 20318.) 



0.05000 ra. CaCL. 



Time hr. 22 hr. 



No. of Stentors 100 



No. of Divisions 



IMortality 100 



Mean Result 



0.04000 m. CaClo. 



Time hr. 22 hr. 



No. of Stentors 100 



No. of Divisions 



Mortality 100 



Mean Result 



0.03000 m. CaCl 



2- 



Time hr. 22 hr. 



No. of Stentors 100 



No. of Divisions 



Mortality 100 



Mean Result 



0.02000 m. CaCL. 



Time hr. 22 hr. 49 hr. 



No. of Stentors 100 16 11 



No. of Divisions Q 



Mortality 84 89 



Mean Result 0.16 0.11 



.01000 m. CaClj. 



Time hr. 22 hr. 49 hr. 



No. of Stentors 100 51 49 



No. of Divisions .... Q 



Mortality 49 51 



Mean Result 0.51 0.49 



