352 CO, Capacity of Blood. II 
was slightly elevated and that when the experiments were discon- 
tinued, after 53 and 4% hours respectively, the animals were in 
excellent condition. 
Experiment 8.—Dog, male, 9 kilos. Light etherization with CO, in- 
halation. Tracheal cannula connected with closed circuit ether bottle. 
Air containing approximately 7 per cent of CO2 administered through 
ether. Dog at all times was kept under very light ether as determined 
by periods of struggling, vigorous breathing, and full reflexes. Equilibrat- 
ing air 5.45 per cent CO. , 
Blood CO). 
Time. Condition. CO: breathed. sales pee 
Content. Capacity. 
p.m. per cent vol. per cent vol. per cent mm. 
3.30 | Normal. 0 49 51 
4.00 | Under ether. 0 42 49 170 
4.05 | CO, started. (ee: 
4.15 (has 58 50 168 
4.45 pe! 
5.00 as 52 55 150 
5.30 (ees 63 57 150 
6.15 7.6 +939) 50 154 
6.45 7.0 60 57 160 
reals 6.8 56 56 150 
7.45 6.8 53 54 160 
Dog in excellent condition. 
Experiment 9.—Dog, male, 14 kilos, young. Similar to Experiment 8. 
Equilibrating air 5.5 per cent COxz. 
Blood CO2. 
Time. Condition. COz breathed. cnenes 
Content. Capacity. 
p.m. ; per cent vol. per cent vol. per cent mm. 
2.48 | Normal. 0 48 47 
3.15 | Ether started. 
3.42 0 128 
3.45 | COs started. 6.2 
4.45 6.2 63 56 116 
5.45 6.0 68 54. 110 
6.45 ree 71 dl 114 
7.45 6.4 62 56 110 
8.45 (ie 67 +59) 108 
Dog in good condition. Blood a good bright normal color. 
