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thofe cafes where the cruft is thickeft, and vice verfu 
The following experiments feem to prove this. 
Experiment XIIL 
I bled a woman who was feven months gone with 
child, and the blood was received into a bafon. In five 
minutes after the vein was opened, a film firft ap- 
peared ; but this fpread fo flowly, that in ten minutes 
it did not cover the whole furface : in fifteen minutes 
it had nearly fpread over the furface ; but the reft 
of the blood was quite fluids at leaft for fome depth* 
and even in half an hour it was not fo firmly jellied 
as it was afterwards. In this cafe there was a very 
thick and ftrong cruft or fize. 
Experiment XlVh- 
Having bled a perfon with a violent rheumatic pain 
in his breaft, the blood was received into three tea- 
cups, and each of them had afterwards a cruft. In the 
firft I obferved the progrefs of the coagulation, as fol- 
lows. The beginning of the coagulation was not 
marked, but at the end of half an hour the film was 
not thicker than common writing-paper; and this be- 
ing removed, a little of the clear lymph was taken up 
with a wet tea-fpoon, put into a clean cup, and was 
twenty minutes more in coagulating. Even at the end 
of an hour and an half, the whole of the blood was 
not jellied; for at this time I removed the film or pel- 
licle, and took up a fecond portion of clear lymph with 
afpoon, and put it into a tea-cup, where it jellied af- 
terwards. 
