BODY TEMPERATURE OF MICE 



335 



A strictly fair. comparison would include only tests which were 

 made under average or 'normal' conditions for each lot. It is 

 plain, however, that if any error has resulted from the course 

 pursued by me, it must be in the nature of an exaggeration of 

 the temperature differences between the warm-room and cold- 

 room animals, rather than the reverse. 



Considering first the adult male mice, the results of my experi- 

 ments may be tabulated as follows: 



If we consider the thirty-second figures alone — these I regard 

 as the more reliable — the mean difference between the two con- 

 trasted lots of individuals is 0.05° in favor of the warm-room 

 animals. In view of the small number of individuals and the 

 high variability, such a difference is certainly negligible. The 

 standard deviation of the warm-room average is 0.81°, that of 

 the cold-room average being 0.75°. (The probable errors of these 

 averages are 0.15° and 0.13° respectively) 



Considering such of the 'maximum' figures as have not been 

 designated in the tables as um-eliable, we likewise find a mean 



