HKSPI RATION. 



The human body does not seem capable of bearing exposure 

 to a cold of 17.5, unless counteracted by active motion, without 

 losing the sensibility and the life of the part thus exposed. Nor 

 can it bear long exposure to a heat of 97, without pernicious 

 effects. Lemonnier staid half an hour each day for twenty -eight 

 days in a bath, heated to 100 without inconvenience. He then 

 went into a bath of 112. In six minutes sweat ran down his 

 face, and his body was red and swelled. After seven minutes he 

 was in a violent agitation, the pulse quick and strong, and dur- 

 ing the eighth minute he was attacked by giddiness, which ob- 

 liged him to come out of the bath.* Dr Berger could bear a 

 bath of 108 only for ten minutes. His pulse rose from 80 to 

 112. Berger and Delaroche suffered little from ten minutes 

 continuance in a dry stove heated to 175, and from thirteen mi- 

 nutes continuance in a vapour bath of 102J.f 



The experiments of Dr Fordyce, Dr Blagden, Sir Joseph 

 Banks, &c. in 1775 are well-known. They went into a room 

 heated to 260, and staid in it for a considerable time without 

 inconvenience. From some of their experiments, particularly 

 those of Dr Fordyce, in which the room was heated by the va- 

 pour of water, it would seem to follow that the human body in 

 certain circumstances, has the power of generating cold4 



The heat of new-born children is higher than that of adults, 

 being 98.5 or 99. According to the observations of John Hun- 

 ter the heat, when we are asleep, is less than when we are awake. 

 Dr John Davy made a set of observations on the temperature 

 of various parts of his body in the morning when coming out of 

 bed, which it may be worth while to state : 



Middle of the sole of the foot, . 90 



Heel under the tendo Achillis, . 93 



Shin bone, . ^ . . 91 J 



Calf of the leg, . . . 93 



Ham, ... 95 



.. Above the artery of the thigh, . 94 



Middle of the rectus muscle of the thigh, 91 

 Groin, .... 96-5 



Quarter of an inch above the navel, . 95 

 Above the 6th left rib, . . 94 



Above the 6th right rib, . . 93 



* Berger; Memoires de la Societe de Physique et d'Hist. Naturelle de Ge- 

 neve, vi. p. 320. 



f Ibid. p. 326. \ Phil. Trans. 1785, pp. Ill, 484. 



