\ 
Ht EY. Ai T. 
ture, and all others celd whofe heat is much below our's, 
and, confequently, affeéts us with the fenfe of cold ; though, 
y their vis vite, they are kept fomewhat warmer than the 
medium in which they live. To this latter clafs writers have 
commonly referred the whole infeét tribe ; though Dr. Ma 
tine obferves. with refpe@ to bees, that the heat of a {warm 
2°, agreeing with Dr. Pit- 
cairn’s obfervation of the beat of ie be fkin, or at 
moft to 94°. - Amontons, by feveral trials, found the 
heat communicated to the human body to b 
93 - Sir Ifaac Newton. makes the external heat of the human 
Dr. Hales found the heat of his {kin to be 
of urine newly made about 103°. 
Mr. Hunter found, by finking the ball of the thermometer 
under his tongue, and keeping it there for fome minutes, 
that the mercu i 
troduced the b: 
rectum was 98°! exadtly. - 
With refpeé to ordinary qiadrupeds, fuch-as dogs, cats, 
cury was railed to 103°, 104°, 105°, 106°, and 107°, and 
hing eggs he once found the height to be 108 -. 
r, Crawford has colle&ed the following 
lating to this fubje@ ; that thofe animals which are furnith 
ith lungs, and which continually refpire the’freth ai 
efh air in 
power of keeping themfelves ata 
ed 
they 
lation. | Farther, among. the 
warmeft. which have the-largeft 
which, confequently, breathe the 
proportion to their bulk ; thus, the. 
birds, compared with their fize, are 
above 112°. 
gh ies 
obfervations re- 
ich ith 
_ that animals were incapable of- enduring, witho 
dergoes in the lungs, it is evident that, ali other circumftances 
being equal, the greater the quantity of air which is chang- 
ed in a given time, the greater muit be the heat produced, 
Moreover, in the fame animal, the degree of: heat is in fore 
mea{ure proportionable to the quantity of air infpired in a 
given time: thus, we find that animal heat is increafed by 
exercife, and by whatever accelerates refpiration. 
But it is obferved, that the heat of animals varies in differ- 
" ent individuals, and> likewife in the fame animals at different 
Imes ; for, though in a healthful ftate the variations are 
a 
blood in high fevers to be about 1 36°% 5 and Dr. Boerhaave 
in twenty-eight > 
ood 
be experienced by a living animal. The late ingenious Mr.. 
Hewfon infers, from fever experiments, per a of 
of. 
b 
in-the blood-veffels ; fince the animal. heat is natura ly only: 
98° or 100°, and in the moft ardent fever it is not railed: 
Phil. Tranf. vol. lx./art. 33. EY 4 
- From fome experiments made by Dr. Dobfen inca heats 
room it appears, that the white of an egg, inclofed m it 
he offers feveral conjectures: for the explication of this phend- 
he: tha 
Philofophers, mifled by the opinion of Boerhaave av 
i i very ‘gt amagmet's- 
pat ye 
cousry. ofthe fallacy of the gener 1 on this Fubject- 
Ju Fosesl ond Tillet being employe oe Le 
om 
