r 40 s j 
erajj amentum felt as if it contained a fluid in a bag, 
as profeflor de Haen has defcrlbed it. Upon prefling 
it, the fluid guflied out, which, in a few minutes 
after being expoled to the air, coagulated : there was 
however this difference in the two cafes, that in 
mine the fluid was red, fo that it formed a red cruft 
over the firfl, which was white. Now this feems to 
have been owing to the blood’s having firfl co- 
agulated, where it was in contact with the air and 
with the fides of the cup; and the fluid which 
guflied out was the ferum , with a part of the coagu- 
lable lymph, which yet remained fluid ; but, when 
expoled to the air, jellied or coagulated, as it naturally 
does. That one part of the lymph can remain fluid 
after the other is coagulated, is proved by fome of the 
preceding experiments ; and I have more than once 
leen blood, which appeared perfedtly jellied foon after 
bleeding ; yet, on cutting into the coagulum , a tran- 
fparent fluid has ouzed out, which afterwards jellied. 
And fo llovvly does this coagulation proceed in fome 
cafes, that, in an experiment mentioned before, a 
part of the blood in a dog’s heart was found uncoagu- 
lated thirteen hours after death. And I have like- 
wife diftindtly obferved, that in fome cafes where 
the difpofition to coagulate was much leflened during 
the evacuation, the blood at the bottom of the cup 
has jellied, whilft the greatefl part of the Jize at the 
top was yet fluid ; there being only a thin pellicle 
on its lurface, where it was in conta(fl with the 
air. 
Another inflance of a change in the properties of 
this coagulable lymph, which appears curious, was 
obferved in fome experiments, where I had occafion 
to 
