(venesection) and allowing from eight to ten ounces of blood to flow
from it. It is seldom used in the treatment of surgical forms of
inflammation.

_Counter-irritants._--In deep-seated inflammations, counter-irritants
are sometimes employed in the form of mustard leaves or blisters,
according to the degree of irritation required. A mustard leaf or
plaster should not be left on longer than ten or fifteen minutes, unless
it is desired to produce a blister. Blistering may be produced by a
_cantharides plaster_, or by painting with _liquor epispasticus_. The
plaster should be left on from eight to ten hours, and if it has failed
to raise a blister, a hot fomentation should be applied to the part.
_Liquor epispasticus_, alone or mixed with equal parts of collodion, is
painted on the part with a brush. Several paintings are often required
before a blister is raised. The preliminary removal of the natural
grease from the skin favours the action of these applications.

The treatment of inflammation in special tissues and organs will be
considered in the sections devoted to regional surgery.

#Chronic Inflammation.#--A variety of types of chronic and subacute
inflammation are met with which, owing to ignorance of their causations,
cannot at present be satisfactorily classified.

The best defined group is that of the _granulomata_, which includes such
important diseases as tuberculosis and syphilis, and in which different
types of chronic inflammation are caused by infection with a specific
organism, all having the common character, however, that abundant
granulation tissue is formed in which cellular changes are more in
evidence than changes in the blood vessels, and in which the subsequent