690 
PROFESSOR HARLEY ON THE INFLUENCE OF 
No. 1. — Air from arterial blood of Dog. 
Volume. 
Barometric 
pressure. 
Temperature. 
Vol. at 0° C. and 
1 metre pressure. 
For carbonic acid. 
Air employed 
140-3 
718-7 
7-7 
98-08 
After absorption of carbonic acid 
139-0 
719-4 
5-8 
97-91 
For oxygen. 
Air employed... 
244-2 
359-0 
6-2 
85-72 
After addition of hydrogen 
331-8 
449-9 
6-1 
146-00 
After explosion 
258-0 
372-9 
4-5 
94-64 
No. 1. — In 100 parts of air. 
Oxygen . . 
Carbonic acid 
Nitrogen . 
1 9-928'> 
0 ^g 0 >Total oxygen 20-111 
79-889 
2nd. As regards venous blood. 
A certain quantity of venous blood was allowed to flow directly from the jugular vein 
of an apparently healthy dog into a glass receiver. It was then secured along with 100 
per cent, of atmospheric air, and kept, as in the previous case, in a room of moderate 
temperature during forty-eight hours. The gas from this blood gave the following 
result : — 
No. 2. — In 100 parts of air. 
Total oxygen 20-557 
Oxygen . . . 18-400 
Carbonic acid . 2-157 
Nitrogen . . . 79-443 
As the composition of ordinary atmospheric air is supposed to be : — 
l 100 parts. 
“} TM oxygen 20-962 
79-038 
it appears from the results of these experiments that both arterial and venous blood act 
in precisely the same manner, the amount alone of their action being different. As 
might have been expected, the venous blood has yielded by simple diffusion a much 
greater amount of carbonic acid than the arterial blood. Moreover, under the same 
circumstances it has absorbed a much larger quantity of oxygen. 
Oxygen . . 
Carbonic acid . 
Nitrogen . 
