influence of the Brain on the Action of Ike Heart , &c. 47 
ature of the two dead animals, under these circumstances, will 
be seen in the following table. 
Time. 
Dead Rabbit whose lungs 
were inflated. 
Dead Rabbit whose lungs 
were not inflated. 
Therm, in the 
Therm, in the 
Therm, in the 
Therm, in the 
Rectum. 
Thorax. 
Rectum. 
Thora x 
Before the ex- 
periment. 
100 
100 
30 min. 
97 
08 
c/ 
45 — 
95i 
9 6 
60 — 
94 
94>i 
75 — 
9H 
98 
90 — 
9 1 
86 
9i 
88^ 
In this last experiment, as may be seen from the above 
table, the difference in the temperature of the two rabbits, at 
the end of an hour and a half, in the rectum, was half a degree, 
and in the thorax two degrees and a half ; whereas, in the pre- 
ceding experiment, at the end of an hour and forty minutes, the 
difference in the rectum was s-j degrees, and in the thorax 
3 degrees. It appears, therefore, that the rabbit in which the 
circulation was maintained by artificial respiration, cooled more 
rapidly on the whole than the rabbit whose lungs were inflated 
in the same manner after the circulation had ceased. This 
is what might be expected, if no heat was produced by the 
chemical action of the air on the blood ; since in the last case 
the cold air was always applied to the same surface, but in the 
former it was applied always to fresh portions of blood, by 
which its cooling powers were communicated to the more dis- 
tant parts of the body. 
In the course of the experiments which I have related, I was 
much indebted to several members of the Society for promo- 
ting the Knowledge of Animal Chemistry, for many important 
suggestions which have assisted me in prosecuting the enquiry. 
