[ 489 1 
very nearly to the fame point ; I could not perceive even 
the fmall difference of one degree, which was obferved 
in our former experiments. Should thefe confiderations, 
however, be thought infufficient to prove that evapora" 
tion was not the foie agent in keeping the body cool, I 
believe that Dr. fordyce’s experiments in moift air will 
be found to remove all doubts on this fubje6t. Several 
of the gentlemen prefent, as well as myfelf, went into the 
room without fliirts many times afterwards, when the 
thermometer had rifen much higher, almoft to 260% 
and found that we could bear the heat very well, though 
the firft fenfation tvas always more difagreeable than 
with our cloaths. 
In all the experiments made this day it was obferved, 
that the thermometer did not fink fo much in confe- 
quence of our ftay in the room as on the 23d of January ; 
probably becaufe a much larger mafs of matter had been 
heated by the longer continuance of the fire. 
Our own obfervations, together with thofe of M. til* 
LET in the Memoirs of the Academy of Sciences had 
given us good reafon to fufpedt, that there mull have 
been fome fallacy in the experiment with a dog, made at 
the defire of Dr. boerhaave, and related in his Elements 
of Chemiflry (O. To determine this matter more exactly, 
we fubjedted a bitch weighing thirty-two pounds, to the 
following experiment. When the thermometer had rifen 
to 220°, the animal was fliut up in the heated room, in* 
clofed in a bafket, that its feet might be defended from 
(if) For the year 1764, p. 186, &c. {c) Tom. I. p, 275-. 
T 1 1 ^ the 
