IO2 



F. G. HALL. 



affin oil, care taken that the blood did not at any time come in 

 contact with the air. The blood was oxalated to prevent clotting. 

 The Van Slyke method was used for the determination of the 

 blood gases (Van Slyke and Stadie) (1921). Usually two 



FIG. 7. Blood gas and swimbladder gas equilibration apparatus. 



determinations were made to insure accuracy. Following these 

 determinations, the test tube containing the blood was inserted 

 in the position shown in Fig. 7, T, (position A). Oil was then 

 drawn up into the tube, through O, to displace the air. The 



