46 



Chapter IV 



Hill dotted them in in pencil on Bohr's curve and showed me the 

 figure ; it was as shown in Fig. 23. 



The solution like most of those made previously had been made 

 by Bohr's method, quoted in the last chapter ; in this particular case 

 however we had omitted, whether by intention or forgetfulness 

 I cannot now remember, to add any ammonium carbonate. 



100 



90 



80 



70 



60 



50 



40 



30 



20 



10 





10 



20 



30 



40 



Iv 



50 



70 



80 



90 



100 



F IG . 24. Ordinate = percentage saturation of haemoglobin. Abscissa = tension of oxygen 

 in mm. of mercury. 



I. Dissociation curve of haemoglobin dissolved in water. 

 II- -7/ NaCl. 



III. -9/ KCl. 



Eectangle surrounding point magnitude of experimental error. Temperature 37 38 C. 



We could only attribute the divergence of our previous curves 

 from that of Bohr to the ammonium carbonate which had been 

 added somewhat casually. We therefore dispensed with this and 



