Aggregation theory 



67 



presence of various pressures of carbon dioxide. It is not a little 

 startling to find that the curves given in Fig. 34 for oxyhaemoglobin 

 are almost superposable upon those in Fig. 29 given for CO-haemo- 

 globin by Douglas, Haldane, J. S. and Haldane, J. B. (11) *. In the figure 

 the curves or some at least of them are drawn in freehand. 



100 



90 



80 



70 



60 



50 



40 



30 



20 



10 



08 



x OC 



19 ri.m.COj 

 * 42ri.m.CO, 



o 



O79rji.rn.CO; 

 A 



16 



24 



FIG. 35. Dissociation curves of CO -haemoglobin. 

 A'.r 



32 -40 



Curves drawn from formula 



j//100= 



1 + Kx" 



Ordinate = percentage saturation with CO. Abscissa = CO pressure 



in mm. Points indicated are the determinations of Haldane and Douglas. 



The points determined by these observers have been transcribed 

 from their figure as faithfully as possible and are shown in Fig. 35. 

 The figure is drawn to a somewhat different scale from theirs for 

 the purpose of comparing the oxygen dissociation curves with the 



* The aggregation theory has been modified by these authors in certain respects. 

 My reasons for prepariiijf the original form of the theory are given in the Biochemical 

 Journal, vn, p. 481. 



52 



