62 
DR. DAVY ON ANIMAL HEAT. 
confines of two seas, in regard to warmth very different in character during a great 
part of the year. The observations were begun early in March, and were continued 
at intervals till the latter end of July. During this time the thermometer in the 
open air ranged from 31° to 94°, and the temperature observed under the tongue from 
97° to 99 0, 5. It may not be amiss to mention some particular instances. 
On the 5th of March, after having been exposed several hours in an open boat on 
the Bosphorus, with a strong wind at 43°, the thermometer placed under the tongue 
stood at 97°. 
On the 11th of the same month, when the ground was covered deeply with snow, 
and the thermometer in the open air at 7 a.m. was 31°, and in a bed-room 45°, the 
temperature under the tongue was found to be 97°'5. 
On the 3rd of April, when the thermometer in the room, with the window open, 
was 66°, under the tongue it was 98 0- 5. 
On the 17 th of July, when the thermometer was 87°, under the tongue it rose to 
99 0, 5. On the 21st of the same month, when the air was 87°, the temperature under 
the tongue was 99 0- 5 ; and on the 28th, when the former was 94°, the latter was 99°. 
During the hot weather of July, it may be deserving of remark, that the pulse was 
less affected than the respiration, which habitually about sixteen in the minute, was 
now commonly fourteen, and one day did not exceed twelve. 
It may also be mentioned that attention was paid to the temperature of the extre- 
mities, and also to that of the urine, and that commonly it was found of highest 
temperature when the tongue and extremities were of lowest temperature : thus, on 
the 5th of March, when the thermometer under the tongue was 97°, the feet and 
hands cold, in the urine it rose to 101°; and on the 28th of July, when under the 
former it was 99°'5, in the latter it was the same. 
Do not these observations, besides tending to confirm the preceding conclusion for 
which they were brought forward, viz. that the temperature of the body rises and 
falls in a perceptible manner with the temperature of the air, lead also to the further 
conclusion, that the tendency of a high temperature of atmosphere is to raise the 
temperature of the surface and of the parts adjoining the surface in a somewhat higher 
ratio than the deep-seated organs ; and of a low temperature of atmosphere to raise 
the temperature of the deep-seated parts, whilst that of the surface is subjected to 
undue reduction from the cooling agencies to which it is exposed, directed, as it were, 
in both instances, for a beneficial result, on the principle of compensation ? 
IV. On the Effect of Exercise on the Temperature of the Body. 
This subject of inquiry, notwithstanding its manifest importance, has been much 
neglected ; indeed, I do not know of any work in which any precise information is to 
be obtained respecting it. 
The observations which I have to offer are fewer than I could wish and more 
limited; they were made at Constantinople in 1841, at intervals between February 
