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Experiment VII. 
Having found, from a number of trials, that blood, 
kept fluid by being mixed with neutral falts, had 
its lymph coagulated by a heat of 125 ° of Fahren- 
heit’s thermometer, I fuppofed that the degree ne- 
ceffary for fixing it in its natural ftate could not be 
very different from this. I therefore prepared a 
lamp-furnace with a fmall veffel of water upon it; 
this water was heated to 125 °j and then laying bare 
the jugular vein of a living dog, I tied it properly, 
cut a piece of it out, and put it into this water : 
after eleven minutes, I took out the vein, opened it, 
and found the blood entirely coagulated s thence I 
concluded, that 125 °, or lefs, was fufficient to coa- 
gulate the blood of a dog. It may be neceflary 
to obferve here, that the part coagulated was only 
the lymph ; for the ferum requires a much greater 
heat to fix it, that is heat of 160 0 , as will appear 
hereafter. 
Experiment VIII. 
The fame experiment was repeated in fuch a man- 
ner, that the heat was never higher than 120 0 and 
an half; and I found, on opening the vein at the end 
pf eleven minutes, that the lymph was entirely coa«* 
gulated, even in this heat. 
Experiment IX# 
I next repeated the experiment, fo that the heat 
was never higher than 114 0 , and was commonly at 
Vol. LX, D d d that 
