98 Hcemajiatics. 
of my Sp. V. Thermometer in my Mouth for 
a confiderable time, while I breached warm 
Air on it, but drew in the cool Air in Infpi- 
lation thro* my Noftrils, the Sp. v. rofe in 
the Thermometer from ten Degrees, the Heat 
of the external Air, to forty fix Degrees a- 
bove the freezing Point 5 fo that in the f—^th 
Part of an Hour, or f of a Minute the in- 
fpired Air had acquired thirty fix Degrees of 
Heat. The natural State of the Blood, in 
which State it then was, being fixty four De- 
grees, and that of the external Air ten Deg. 
it was therefore fifty four Degrees colder chan 
the Blood, yet in fo (horc a time it acquired 
thirty fix Deg. of Heat. 
ly. The Quantity of Blood, which pafies 
thro* the Lungs of a Man in a Minute, being 
eftimated in Experiment YllL Numb, 12. to, 
be 8.74 Pounds or 218.8 cubic Inches ; and 
the Quantity of Air drawn in at each Infpi* 
ration being forty cubic Inches, as eftimated in 
Vol. I. p. 245, they will amount to eight 
hundred cubic Inches in the twenty Infpira- 
tions of a Minute ; fo that this Quantity of 
Air will be to chat of Blood as j.48 is to i : The 
Blood's (pecific Gravity to that of Air is as 841 
to I. 
16 , I 
