Y. Henderson and H. W. Haggard 343 
Experiment 8.—Dog, male, 8 kilos. CO: administration. Procedure 
same as Experiment 7, except that morphine was omitted. Equilibrating 
air 5.5 per cent COs. 
Blood COz. 
Time. Condition. a craie| co oa Leta 
Content. Capacity. 
p.m. per cent vol. per cent | vol. per cent MO. 
4.15 Normal. . 51 50 39.8 
4.30 CO, started. . 6.0 
4.45 54 55 
5.15 10.2 68 59 39.9 
5.45 11.4 72 64 
6.15 74 63 
6.20 CO, stopped. 
6.45 64 Giae 
Experiment 9.—Dog, female, 14 kilos. CO: administration. Pro- 
cedure similar to Experiment 8. Equilibrating air 5.4 per cent COs. 
: Blood COs2. 
Time. Condition. aa Uae Ae oe oe TREE SEE fa oaenrs 
Content. Capacity. 
p.m. per cent vol. per cent | vol. per cent °C 
1.40 Normal. 48 46 39.8 
2.15 CO; started. 6.0 1 
2.45 8.2 62 54 39.7 
3.15 . 66 56 39.6 
3.45 10.3 73 ; 59 
4.15 72 61 39.8 
4.20 CO: stopped. 
4.45 54 59 
5.15 50 54 
5.45 os 47 52 
