C 48 s 1 
rimeiits was made aboiit eight o’clock in the evenings 
whm the heat was at the greateft: a very large thermo- 
meter, placed at a diftance from the door of the room, 
but nearer to the wall than to the cockle, and defended 
from the immediate a6lion of the cockle by a piece of 
paper hung before it, rofeoneor two degrees above 260"" ; 
another thermometer, which had been fufpended very 
near the door, flood fome degrees above 240°. At this 
time I went into the room, with the addition, to my 
common cloaths, of a pair of thick worfled flockings 
draw'll over my flioes, and reaching fome way above my 
knees; I alfo put on a pair of gloves, and held a cloth 
conllantly between my face and the cockle: all thefe 
precautions were necelfary to guard againfl the fcorching 
of the red-hot iron. I remained eight minutes in this 
fituation, frequently walking about to all the different 
parts of the room, but Handing Hill moH of the time in 
the cOoleH fpot, near the loweH thermometer. The air 
felt very hot, but Hill by no means to fuch a degree as to 
give pain : on the contrary, I had no doubt of being able 
to fupport a much greater heat ; and all the gentlemen 
prefent, who went into the room, were of the fame opi- 
nion. I fweated, but not very profufely. For feven mi- 
nutes my breathing continued perfedlly good ; but afte 
that time I began to feel an oppreffion in my lungs, at- 
tended with a fenfe of anxiety ; which gradually increaf- 
ing for the fpace of a minute, I thought it moH prudent 
to put an end to the experiment, and immediately left 
the room. My-pulfe, counted as foon as I came into the 
cool air, for the uneafy feeling rendered me incapable of 
examining 
