324 



FRANCIS B. SUMNER 



In thus restricting the groups between which comparisons are 

 vahd, it will be found that the number of available figures is 

 never large. In respect to certain problems, indeed, the number 

 is so small as to yield quite inconclusive results. This is due 

 partly to the fact that my time was largely occupied with other 

 matters during that part of the year when large differences of 

 temperature were obtainable; partly to the fact that the scanti- 

 ness of strictly comparable data was not realized by me until I 

 had made a preliminary tabulation of the results, rather late in 

 the winter. I believe, however, that we shall be able to distin- 

 guish those cases in which the evidence is sufficient from those 

 in which it is insufficient. 



2. Differences of body temperature due to factors other than the 



temperature of the air 



In order to illustrate the effects of factors which are irrelevant 

 to the main problem under discussion, I present herewith the 

 results of 30 temperature readings of 5 adult males, taken in the 

 course of twenty-seven to twenty-eight hours, under conditions 

 of room temperature which varied but little during this period. 

 The figures arfe taken from table 9. Here, the absolute tempera- 

 tures are given for the first test only,^^ the differences being stated 

 thereafter. 



" These are taken from the thirty-second column, but closely similar results 

 are obtained from the maximum column. 



