DR. DAVY ON ANIMAL HEAT. 
63 
and August, and had for their object mainly to endeavour to determine the effect of 
moderate exercise in walking on the temperature of the body. The individual on 
whom they were made was the same as was mentioned in the last section. The par- 
ticular observations are the following : 
February 19th, at 1 | p.m., air of room 60°; before walking, feet cold, temperature 
between the toes 66 °; under the tongue 98°; urine 100°. At b\ p.m., open air 40°; 
just returned from a walk, gently warmed by the exercise ; feet and hands warm ; 
the former 96 0- 5, the latter 97°; under the tongue 98°; urine 101°. 
March 2 nd, at 4|- p.m., open air 50°; air of room 66 ° ; feet and hands moderately 
warm ; the former 75°, the latter 81°; under the tongue 98°; urine 100 °. At 5^ p.m., 
after having walked pretty quickly an hour, a gentle perspiration produced, the hands 
and feet hot, found the latter 99°, the former 98°; under the tongue 98°; the urine 
101°*5. 
March 20 th, at 5^ p.m., open air 42°; returned warm after a w T alk of three hours: 
the hands, which had worn warm gloves, were 99° ; feet 97° ; under the tongue 98° ; 
the urine 101°*5. 
April 7 th, after a walk of three hours in the open air, between 60° and 7 0°, returned 
at 5 p.m., gently perspiring : the hands were 94° ; the feet 96 0, 5 ; under the tongue 
98°’5 ; the urine 100 o- 5. 
May 27 th, at 6 f p.m., after a walk of an hour and half, the air 68 °, returned slightly 
perspiring ; the hands were 95° ; the feet hot ; under the tongue 99°*5 ; the urine 
10 1 °*5. 
May 28th, air 65° ; under the tongue before taking exercise 98 ,0 5 : after a walk of 
four hours and half, gently perspiring, under the tongue 98° ; hands 93° ; feet 97°’5 3 
urine 100 o< 5. 
September 13, at 4 p.m., the open air on the shore of the Bosphorus 76° : ascended 
in about twenty minutes, without stopping, the steep side of the hill, called the Giant’s 
Mountain; on reaching its summit, when profusely perspiring, the pulse was 102 °, 
usually about 52°; the hand 98° ; under the tongue 98°. The pulse of another indi- 
vidual in company, of about the same age, also profusely perspiring, was 138°; ther- 
mometer under his tongue 98° ; and in the hand the same. After descent, the pulse 
of the former was 94°; thermometer under his tongue and in the hand 98°'5 ; the 
pulse of the latter was 112 °; the thermometer under his tongue 98 0, 5 ; both only 
gently perspiring. 
What is the inference from these observations ? Do they not seem to indicate that 
whilst moderate exercise promotes the diffusion of temperature and its exaltation in 
the extremities, it augments very little, if at all, the heat of the deep-seated parts ? 
And considering the blood as the heating medium, warmed itself chiefly by respira- 
tion, is not this what might be expected, reasoning on the subject ? By active exercise, 
the pulse and the respiration ai‘e both accelerated ; more oxygen, it may be presumed, 
is consumed) more heat is generated ; the blood is made to circulate more rapidly, 
