[ 6 3 
bear the difference of 60, 62 , or 64 degrees of 
heat. 
3 . That we are able to endure a greater degree 
of heat, than what has been hitherto thought enough 
to kill animals, as will appear from the following 
example : 
A ioldier being confin’d to a tent call’d the fland- 
ard-guard, while the weather was fo extremely hot, 
that the thermometer rofe within the tent 103 or 104 
degrees * 5 on the fecond day his pulfe was quick 
and full, his mouth foul, and he complain’d of 
third:, a naufea, and head-ach. A thermometer be- 
ing then kept for fome time in his arm-pit, rofe to 
106 degrees. On the third day all the fymptoms 
increafed ; tho’ the thermometer applied to his body, 
rofe no higher than the day before : but, upon my 
reprefenting the danger from the heat, he was en- 
larged, and thereupon immediately recover’d. 
The heat in this inftance was feveral degrees be- 
yond what the learned profeffor Boerhaave thought 
fufficient to coagulate the blood. 
4. That a damp air {ceteris paribus) gives a fen- 
fation of greater heat or cold than a dry air ; viz. 
a fenfation of greater heat, when the Mercury is 
about 70 degrees or upwards ; and of cold, when 
about 50 degrees, or below that point. 
5. That we are able to endure the open air, when 
heated to a degree confiderably greater than the air 
of a room, that is heated by a fi re : and, fince one 
may flay fame hours in a bagnio, where the heat 
is 
* By Fahrenheit’s fcale. 
