likewise issues and setons, is 
ters,—those applications which, 
in, occasion a thin serous fluid to 3 
snts, raise the cuticle, and form the appearance of a 
This effect arises from their strong stimulating power, 
i$ Stimulant operation, and the pain they excite, are to be 
the advantages derived from them im the treatment of dis- 
ease. The evacuation they occasion is too inconsiderable to have — 
‘It is a principle sufficiently established with regard to the living 
- -system, that where a morbid action exists; it may often be removed — 
by inducing an action of a different kind in the same or in a neighbor: 
ing part. On this principle is explained the utility of blisters in loc 
inflammation and spasmodic action, and it regulates their apple — 
in inflammations of the lungs, stomach, liver, brain,.and — 
eumatism, colic, and spasmodic affections of the stomach; 
in which they are employed with the most marked advan- — 
A similar principle exists with respect to pain ; exciting one pain 
often relieves another. Hence blisters often give relief in toothach, — 
and some other painful affections. 
~ Lastly, blisters, by their operation, communicate a stimulus to the 
whole system, and raise the vigor of the circulation. Hence, in patty 
: suulity in fevers ofthe typhoid kind, though in such cases they 
with still more advantage to obviate or remove local inflam- 
RUBEFACIENTS. ee 
Rubefacients excite pain and inflammation, but in a less degree — 
ters, so that no fluid is discharged. They stimulate 
in general, and obviate local inflammation, and are 
ily the same purposes as blisters. ee 
Any stimulating application may be used for this purpose. 
-Canruarmes added in a small proportion to a plaster, or the t 
ture of cantharides applied by friction to a part, is often empl 
- as a rubefacient. : we? 2 
AmmonrA mixed with one, two, or three parts of ex 
_ forms a liniment frequently used for this purpose in rheumatism, 
_ ina, and other cases of local inflammation. seine Sel, 
REMEDIES ACTING CHEMICALL’ 
| CLASS ”XIV.—REFRIGERANTS. 
- fined, substances which directly diminish the foree 0 
tion, and reduce the heat of the body, without oeeasi 
