L 113 ] 
the human body, Dr. foudyce tried the following expe- 
riments. 
He procured a fuite of rooms, of which the hotteft was 
heated by flues in the floor, and by pouring upon it boil- 
ing water; and the fecond was heated by the fame flues, 
which pafled through its floor to the third. The firft 
room was nearly circular, about ten or twelve feet in dia- 
meter and height, and covered with a dome, in the top 
of which was a fmall window. The fecond and third 
rooms were fquare, and both furniflied with a fhy-light. 
There was no chimney in thefe rooms, nor any vent for 
the air, excepting through crevices at the door. In the 
firfl: room were placed three thermometers ; one in the 
hotteft part of it, another in the cooleft part, and a third 
on the table, to be ufed occalionally in the courfe of the 
experiment ; the frame of this laft was made to turn back 
by a joint, fo as to leave the ball and about two inches of 
the ftem quite bare, that it might be more conveniently 
applied for afcertaining the heat of the body, and feve- 
ral other purpofes. 
EXPERIMENT I. 
In the firft room the higheft thermometer flood at i z 
theloweft at 1 1 0°; in the fecond room the heat was from 
90° to 85°; the third room felt moderately warm, while 
the external air Was below the freezing point. About 
three hours after breakfaft, Dr. fordyce having taken 
off all his cloaths, except his fliirt, in the third room, and 
being furniflied with wooden flioes, or rather fandals tied 
on with lift, entered into the fecond room, and ftaid five 
I minutes 
