47 



burned, as in starving animals, they will 

 sHiver too. It makes no difference, as to 

 tlie production of animal heat, whether 

 you give insufficient food or insufficient 

 oxygen. The result as to heat production 

 will be the same, just as in a stove you 

 get similar results from using little fuel 

 or shutting off the draft. In other words, 

 you get the same objective symptom of 

 shivering whether you starve the animal 

 by withholding food or withholding oxy- 

 gen. 



When food supply is in excess, espec- 

 ially if the amount of fresh air is limited, 

 nature has a fashion of relieving the blood 

 of the excess of carbonaceous material by 

 storing it up as fat — and especially as 

 subcutaneous fat, — and the animal, instead 



