222 



Chapter XIV 



in each case. It is repeated six times corresponding to six occasions 

 on which the determinations were made. In all it represents about 

 forty different determinations no one of which is seriously off the line. 



20 40 60 80 100. 



100 



100 



100 



100 



100 



20 40 60 80 100 



FIG. 107. Dissociation curve of Barcroft's blood determined on various occasions. 



The curve is the same in each case. 



My own curve has been investigated from time to time over a 

 period extending from the summer of 1909 to that of 1912. The 



