a a 
HE AT. 
grain. 0 of the province of Angoumois, contrived,: for this 
es aa “to expofe the atie&ted corn, with the in- 
feéts “included in it, in an ’ of which 
° 
Fy 
fon 
re) 
oO 
a5, 
cr 
BY 
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they conveyed in an ng de- 
firous of knowing the precife heat of the mercury whillt the 
‘thermometer remained in the oven, a girl, of the ate 
tendants on the oven, entered it, aad marked the thermome- 
fhe afterwards remained there ten ininutes longer, the mer- 
cury inthe thermometer ftanding at 288°, or 76 above that of 
boiling water ; and when fhe came out of the oven, her com- 
ee was confiderably heightened, but her refpiration was 
ay no means quick and laborious. Thefe pene were- 
ait 
erwards repeated, when another girl remained in 
without much inconvenience, and under the fame 
the air, thus violently heated, for a 
without cere inconvenience: to which we ma 
ai an ingenious anonymo 
one that the bulk of their bodies might alfo contribute to 
Pos fecurity ; and as in common refpiration, the blood in 
its paflage through the lungs is cooled by being brought into 
contact with the external infpired air: in the prefent cafe, 
on the contrary, the veficles and veffels of t the lungs, receiv. ° 
ing at each infpiration an air heated to 300°, mutt have been 
continually cooled and refrefhed, as walsa as the fubeutaneous 
pre #e os fucceffive arrival ox the whole mafs of b 
interior parts of the body, whofe heat 
: the 
aah be fappofed, at the beginning of the fap lg not 
Hitt. 
to exceed 100 Atad. Science. 1 
mem. ii. 
~ Thefe extraordinary facts ag te py lead piaelaohe 
into a a new train of r 
to fhew, that ig Sinai have 
3 
2 5 
S 
a oe. 
|, 
ta 
a 
fecond the heat was from 9o° to 85°; and the third room 
felt moderately warm, whilll the external air was below the 
freezing point. Dr. Fordyce, shavih dnceohed himfelf to 
his thirt in the third room enteré ei econd room, and 
thaid ae gee ina Jee ‘of go”; fa then entered the firft 
rh of t 
20°, eye after ftaying there twenty minute es, he found that de 
hometer, placed “under his oe oe oe held 
his u 
in his 
ny : 
ee ‘experiment, tthe ight ‘hermometcr in the 
us remarker on this experi- 
e part heated to 110” = 
of the fame. venience fre 
made 
firft room ‘varied from 132° to 130°, and the loweft Rood 
I aving undrefled in an adjoining chamber, ‘he, 
went 3, “ft into Ki heat of 119°, and in half a minute he. 
water flowed down over his whole body in ftreams ; having, 
remained here fifteen minutes, he went ap the heat of 1305 
at this time is are of his body was 100°, an pu ulfe 
beat 126 time minute; in this fituation a Florence 
flafix, filledsvith at Hs heated to 
bs] 
ct 
sina minute, out the 
excel 100°, 
Dr. For aE obferves, on this experiment, iad there was 
no evaporation, Be ‘gonitantly a condenfation of vapours on 
his body, and n the animal 
powers. Hay Fy ge much longer in.a much reater 
to infer, a m this catoee e, that dry air does Pi come. 
muinicate its heat like air faturated with moifture ; and that 
_ the evaperation from the body, which takes place when the 
air-is dry, affilts its living powers in producing celd. 
n another experiment, Dr. Fordyce, accompanied with. 
four other gentlemen, went into the heated chamber where 
the air was dry, without. taking off their clothes. When 
they firit entered the room, the quickfilver ftood above 150°, 
ey contiaued i in it more Fan twenty minutes, in chick 
time the heat had rifen about 12°.” In another period of 
experiment, the Gack ileer ftood at 198’, and they con- 
tinued in this heat about ten minutes ; but finding that the 
thermometer funk very faft when they went together, they 
agreed to go in feparately. Dr. Solander ttood in the room 
heated to 210° for three minutes, during which time the quick- 
filver funk to Ley 
fe 
7.2 
We) 
Fs 
efervi 
. Whenever they Be a on the 
thermometer, the mercury -funk feyeral 7 aa ; every expie. 
i a pleafant_ cooling impreflion to the noftrils,. 
Lik b the hig: iit paul which the a; pa, 
ratus pale gs of was capable of dee their bode Ty 
hen i 
periments, clearly 
presrh ics heat ; byt 
the ; polled no refit pers NS the heated. rate be- 
o Phat “eras itiebted, but ba : 
egrees of | and it appears, b 
other experi ments, that the fame perfon, who felt no lasts 
‘enience from air heated to” 211°, could not not bear quickfilver 
it. qui heated to 120° furnithed, in a a 
heat for the living powers to deftroy than {j h 
to 130°, or air to 211°. Accordi gly, when they were in 
rooms, their watch-c 
that 
