The dissociation curve in man 



221 



and Douglas were each determined on 1 c.c. of blood in the old 

 Barcroft-Haldane apparatus. Moreover in some of their determina- 

 tions the Oxford observers used sodium carbonate and in others 



100 



20 



40 



120 



100 



100 



100 



100 



100 



100 



80 



100 



120 



FIG. 106. Dissociation curve of Douglas' blood as determined on various occasions, 

 extending over about two years. The curve is the same in each case. 



ammonia for the purpose of laking their blood. An examination of 

 the figure will show that no difference can be observed in the curve 

 between one time and another. In the figure the curve is the same 



