Number of amebas living 

 £xp. 5. 10° C. Date 



Nucleated Non-nucleated 



Oct. 



llie life of both fragments was prolonged by cold in 

 this case, out in two other cases it was distinctly short- 

 ened. This may have been due to the use of different cultures 



if susceptibility to high or low temperature may be 

 used as an index to the rate of metabolism, there is no 

 very great difference between the two fragments. There is 

 some evidence that cells in which metabolic processes are 

 rapid show a greater susceptibility to high temperature 

 than do cells with a low metabolism (Child, 1^15, p 66). 

 If this is true, there is some slight indication of a more 

 rapid metabolism in the non-nuclear fragment. 



(55) 



