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upon fluid blood out of the body. 
No. 1. had separated seven drams of serum, had a greyish 
film T ' 6 th of an inch thick ; the coagulum was coloured, 
loose in its texture, interspersed with specks of white coagu- 
lable lymph; and at the lower part there was a cell, the 
shape of the piece of iron, the sides of which had the same 
frosted floculent appearance seen in the drawing of the 
aneurism. No. 2. had separated 12 drams of serum, had a 
film - T a of an inch thick, the coagulum was more solid, 
coloured, interspersed with specks of coagulable lymph, and 
had a cell in all respects like that in No. 1. 
No. 3. had separated 12 drams of serum, had a bully coat, 
much cupped, ~ of an inch thick ; the coloured coagulum 
very solid, and no cavity was found where the iron had been 
situated. 
To determine the effect of lower temperature, I made a 
similar experiment with three leaden ounce balls, 1st heated 
to 200°, 2d to 1 6o°, 3d to 120°. At the end of 24 hours, the 
balls having been left in the cups, No. 1. had a film of buff 
-*_th part of an inch, separated 4 drams of serum, round the 
cavity surrounding the ball a film ~th of an inch. No. 2. 
had a film -* T th of an inch, serum 6j drams, round the ball 
no film. No. 3. bulfy and cupped, the buff T ^-th of an inch, 
whiter and tougher than the other. The overplus blood 
drawn into a porringer not in the least huffy. 
From these experiments, blood is rendered buffy at the top 
by a heat of 120°, and when poured on substances heated 
above 212 0 the coagulable lymph is separated where it comes 
in contact with the heated body. 
It is a fact ascertained, that when blood is drawn from the 
arm into a cup immersed in boiling water, which is kept for 
mdcccxxvi. 2 D 
