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forms of which, when performed in the usual way, (from the veins at the bend of the arm) I consider by far the safer and more convenient methods. Of the latter mode (Artieriotomy) I can say nothing from experience, having never seen it resort- ed to; but am rather disposed to consider it unsafe, and very seldom called for.
For the purpose of abstracting blood locally, Leeches, and cups, with scarifications may be resorted to. The principal object in general blood-letting is to reduce the mass of circulating fluid, and thereby diminish the force with which the heart contracts.
The object of local blood-letting is some- times to empty the gorged and offensive capillaries of a part: more often perhaps to divert the flow of blood from an affected organ; thus producing a revulsion effect.
The indications for the abstraction of blood are I think chiefly to be derived from the
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