694 
PROFESS OB HARLEY ON THE INFLUENCE OF 
It is here seen that the reciprocal action of blood and air is gradual, and one requiring 
time, a fact which supports the view that the inspired air gradually combines with the 
constituents of the blood in the torrent of the circulation. 
(d) Influence of Temperature. 
1st. As regards the amount of carbonic acid exhaled. 
Three equal portions of freshly-defibrinated ox-blood, after being well arterialized by 
repeated agitation, were put into receivers with 100 per cent, of air, and kept at the 
following different temperatures during 3J hours : — 
1st. At 0° C. 
2nd. At 26° C. 
3rd. At 38° C. 
No. 11. — The results when calculated yield in 100 parts of air, — 
1st. Temperature 0° C.=0-00 carbonic acid. 
2nd. „ 26°C. = 3-08 
3rd. „ 38° C.=4-07 
Thus the higher the temperature, up to a certain point, the greater is the amount of 
carbonic acid exhaled. 
In order to see if the same rule is applicable to the oxidation of the constituents of 
the blood, other three portions of defibrinated ox-blood were taken, and after being 
treated in the usual way, were kept at different temperatures during twenty-four hours. 
(a) In an ice cellar. 
(b) In a room at 12° C. 
(c) In an artificial digesting apparatus heated to 38° C. 
(a) Ox-blood with 100 per cent, of air, twenty-four hours’ action at 0° C. Result 
No. 12. — In 100 parts of air. 
Nitrogen . . . 81-98 
This experiment was made in foggy weather. 
(b) Ox-blood with 100 per cent, of air, twenty-four hours’ action at 12° C. Result 
No. 13. — In 100 parts of air. 
Oxygen. . . . 12‘54l m , „ ^ 
Carbonic acid. . 2 . 77 }Total oxygen 15-31 
Nitrogen . . . 74*69 
