t 493 ] 
nature which feems more immediately connected with 
the powers of life, is, probably, the great agent in pre- 
fervingthe jullbalanceof temperature; exerting a greater 
effort in proportion as the evaporation is deficient, and a 
lefs effort as the evaporation increafes. This idea cor- 
refponds with the general analogy of the animal oeco- 
nomy, the nicer balances of which are almofi; univerfally 
effected in that part of the body which is formed with 
the moft fubtile organization. 
The heated room will, I hope, in time become a very 
iifeful inftrument in the hands of the phyfician. Hi- 
therto the neceffary experiments have not been made to 
direct its application with a fufiicient degree of cer- 
tainty. However, we can already perceive a foundation 
for fome difl:in(?tions in the ufe of this uncommon re- 
medy. Should the objedl: in view be to produce a pro- 
fufe perfpiration, a dry heat adling on the naked body 
would mofi: effe6tually anfwer that purpofe. . The hifto- 
ries of dropfies and fome other difeafes, fuppofed to have 
been cured by fuch means, are well known to every phy- 
fician. In. fome cafes alfo, a moift heat, and in others heat: 
tranfmitted through a quantity of cloaths, might have 
their peculiar advantages , That the danger likely to en- 
fue from fuch applicatiofis is lefs than has been commonly 
apprehended, our former experiments gave fufficient rea- 
fon to believe, and the fame was amply confirmed by 
thofe which make the fubjedt of this paper.- For during^ 
the whole day, we paffed out of the heated room, after- 
every experiment, immediately into the cold air, with- 
out! 
