230 



sweated him : in that of 1 10% the perspiration was 

 more profuse, and streams of water *ran down his 

 body : in ten minutes more, he entered the room of 

 120, and after staying there twenty minutes, the 

 mercury of the thermometer which he held in his 

 hand, and placed under his tongue, stood just at 

 10O, and his urine was of the same temperature. 

 His pulse was 145, the veins on the surface of the 

 body were much enlarged, the external circulation 

 greatly increased, and an universal redness and 

 strong sense of heat diffused itself over the whole 

 body. He afterwards remained fifteen minutes in a 

 room heated to 139, and the temperature of liis 

 body under the tongue, in his hand, and urine, did 

 not exceed 100. Sir Joseph Banks, Sir Charles 

 Blagden, and Dr Solander, wont afterwards into 

 rooms heated to 21 2\ the heat of boiling water, 

 where they remained several minutes. The feeling 

 communicated by the air was unpleasant, but easily 

 borne : and respiration was little affected, except 

 in the want of that refreshing coolness which the in- 

 spiration of cool air imparts. If they breathed on 

 the thermometer, it sank several degrees ; and eve- 

 ry expiration was cool to the nostrils, previously 

 scorched by the hot inspired air. The body, to the 

 touch of the ringers, felt cold as a corpse, and the 

 actual heat of the skin, and under the tongue, was 

 98. Sir Joseph Banks alone sweated profusely. 

 In a subsequent experiment, Sir Charles Blagden re- 

 mained eight minutes in a room heated to 260 : the 

 air felt hot, but did not give pain, and the sweating 

 was not profuse : the sensible heat of the body va- 

 ried but little. For seven minutes, the breathing 



