Castration of Hen-Feathered Campines. 69 



Our experiments do not indicate that any immediate relation- 

 ship exists between the sugar and either the oxygen capacity or 

 oxygen content of the blood. There is a direct relationship, 

 however, between the ratio of the oxygen content to the oxygen 

 capacity, i.e., the percentage saturation, and the sugar of the 

 blood. From this it will be seen that the sugar varies in the 

 opposite direction to the course which it takes in asphyxial hyper- 

 glycemia, which is a well-established phenomenon. This lack of 

 agreement is, to our minds, apparent rather than real since the 

 hyperglycemia of asphyxia is probably due directly, at least in 

 part, to the increased amounts of adrenalin discharged under 

 these conditions and only indirectly to the low content of oxygen. 

 See columns IV and XV, Table I. 



In a few experiments the relative volumes of the corpuscles 

 and serum have been determined by a precision hematocrit. 

 The content of oxygen per unit volume of corpuscles was then 

 calculated and was found to bear a direct relationship to the blood 

 sugar. The oxygen capacity per unit volume for the same 

 experiments showed only slight variations. In these experiments 

 the corpuscular volume might be taken as an index of the oxygen 

 capacity of the blood. This confirms the observations noted 

 above that there is a relationship between the blood sugar and 

 the degree of saturation of the blood with oxygen. See Table II. 



table 11. 



Dog. 



O2 Capacity 

 Corp. Vol. 



0 2 Content 

 Corp. Vol. 



Sugar in Mg. 



IV 



m Xio. 



A 



S3 



38 



73 



19 



E 



51 



28 



63 



22 



F. . 



57 



36 



71 



20 



G 



55 



36 



77 



21 



H 



52 



36 



74 



20 



