_A._ By external application.
_The Stimulus of Heat_, _Frictions_, _&c._
_B._ By Medicines which enter the circulation and stimulate the
cutaneous vessels _by contact_.
_Mercurials_—_Sulphur_.
_C._ By Medicines which act on the surface _sympathetically_,
through the medium of the Stomach.
_Cold Drinks_, _&c._