12 



Scientific Proceedings (6i). 



In addition to any bearing which the content of sugar in the 

 blood of these animals may have upon the problem in hand the 

 apparatus offered a means for determining whether certain ex- 

 treme weather conditions would introduce a disturbing factor in 

 experiments involving the determination of sugar in the blood. 

 In order to avoid vitiating the results by emotional hyperglycemia, 

 only the blood from those animals which appeared quiet during 

 confinement in the chamber and upon removal was taken for 

 analysis. The normal or standard percentage of sugar in the 

 blood of cats — 0.069 P er cent. — reported elsewhere by one of us, 1 

 was determined upon animals which could be presumed to be in 

 every way comparable with chose used in these experiments except 

 for the experimental conditions. The results of our observations 

 are as follows: 



No. of 

 Animals. 



Tempera- 

 ture of 

 Air in De- 

 grees c. 



Humidity 

 of Air in 

 Per Cent. 



Sugar: Gm. Per Cent. 



Sugar : Percentage of 

 Standard 



Actually 

 Found. 



Calculated to 30 

 Gms. of Blood per 

 Kg. of Body Wt. 



Actual. 



Calculated. 



9 

 5 



21.27 

 33-08 



56.44 

 89.50 



0.068 

 0.060 



O.067 

 O.057 



98.6 

 87.O 



94-8 

 83.O 



It is thus seen that the average found for the cats kept at the low 

 temperature and low humidity was practically identical with the 

 standard, while the animals kept under the adverse conditions 

 described gave an average of only 0.060 per cent., or 87 per cent, 

 of the standard. The significance of this difference is somewhat 

 difficult to determine; this is especially so in the absence of the 

 coefficient of respiration. It is possible that less sugar is mobilized 

 in response to the lessened heat requirements of the organism. 



1 E. L. Scott, American Journal of Physiology, 34, 1914, p. 271. 



