34 Dr. Fordyce’s Lediure 
were to be removed by diflolving out the obdrudling matter 
that the blood was mixed fo perfectly through all the body, 
and fo condantly, that the fame blood mud be taken away, 
whatever blood-veffel was opened; and when we contemplate 
the numerous openings and communications of the veflels 
with one another, that blood flowing out of any one will 
empty them all equally, and that, therefore, it can be of no 
confequence from what part of the body blood is evacuated. 
In a pleurify, for inftance, where can be the difference, whe- 
ther blood be taken from the right or left arm, or from the 
veffels of the fkin of the bread ? But there is a difference, and a 
great one too ; fince taking a much lefs quantity of blood from 
the fkin of the bread, is actually known, in certain cafes, from 
experience, to cure a pleurify, than would have had that efteT 
if taken from the veflels in the arm, and will even carry off 
thedifeafe, when it could not be carried off at all by evacuation 
from the arm : yet it is undoubtedly the very fame blood in all 
its qualities ; and in both cafes the vedels of the pleura are 
equally emptied. The a 61 of flowing out of the blood from 
the veflels of the fkin of the bread then has an immediate 
action on the adion of the moving parts in the pleura, and car- 
ries off the inflammation independent of the circulation, or 
any of its laws ; and fo far has the knowledge of the circula- 
tion been of any advantage in this cafe, that it had nearly 
thrown out topical bleeding in inflammation, which is one of 
our mod powerful remedies in the difeafe. In like manner, 
when the moving fibres of the domach do not contrail, fo as 
to expel any vapour that may get into it, a fpice applied to the 
fkin over the domach will, in many cafes, occafion thefe 
fibres to contrail. Now it is well known from anatomy, that 
there is no communication between the fkin of the abdomen 
and 
