C 370 ] 
a third portion of the blood was then received from 
the fame vein into a bafon, and was fet upon a 
table, the heat of the atmofphere being at 67°. 
Now, according to their opinion, the two former 
fhould neither have coagulated nor feparated, when 
that in the bafon began to feparate; button the con- 
trary, they were all three found to coagulate nearly 
in the fame time ; and thofe in the warm water, not 
only did feparate as well as the other, but even 
fooner. 
Experiment II. 
The fame experiment was repeated on the blood 
of a perfon that laboured under the acute rheuma- 
tifm, whilftthe heat of the atmofphere was no higher 
than 55 0 , and that of the warm water was 108° ; and 
the refult of this experiment was not only a con- 
firmation of what was obferved in the firft, but it 
even fhewed, that, that degree of heat was fo far 
from leftening, that it increafed the difpofition to 
coagulate ; for the blood in the cup and in the phial 
was not only coagulated, but the feparation was much 
advanced before the whole of the blood in the bafon 
was coagulated. Thence I am led to conclude, that 
the feparation of the blood in a given time, is in 
proportion as the heat in which it hands is nearer 
to the animal heat, or 98°; or greater . in that heat 
than in any of a lefs degree. And I am confirmed 
in this inference by experiments hereafter to be re- 
lated, where the blood in the living animal whilll 
at reft was found both to coagulate and to feparate. 
It is well known, that the crajjamentum confifts of 
two parts, of which one gives it folidity, and is by 
fome 
