144 Oxygen in the Venous Blood. I 
SUMMARY. 
1. A report is made of a series of determinations by the Van 
Slyke method of the oxygen in the blood drawn from the vena 
mediana in normal resting individuals. 
2. A procedure for drawing the blood without stasis or absorp- 
tion of air has been devised. | 
3. The difference between the total oxygen-combining power 
of the hemoglobin and the oxygen in the venous blood is cal- 
culated. This figure is termed the oxygen unsaturation of the 
venous blood. 
4. The results are the following: 
TABLE IV. 
Oxygen content of venous blood. {Oxygen unsaturation of venous blood. 
_No. of |No. of de- Vol. per cent. Vol. per cent. 
individ- | termina- 
uals. tions. Maximum.|/Minimum.| Average. |Maximum. |Minimum. | Average. 
12 38 17.98 9.55 13.6 8.95 2.70 | 5.8 
| | 
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