An Oration, DELIVERED AT THE ANNIVERSARY OF THE ABERNETHY SOCIETY
391 ployed, the loss of blood would have been useless in regard oi the removal of the pleuritic fluid, seeing that more rapid removal than that actually affected is not easily conceivable, and scarcely ever observed. Persons may be found, perhaps; to raise the objection, that on the forty-ninth day of the disease, friction-sound was still audible, a state of things which, they might urge, would probably not have existed, had venesection (or at least fuller abstraction of blood by cupping) been
... d by cupping) been put in force. But the onus probandi would rest with the ob jectors. I myself doubt greatly that any mode of treatment can accomplish the total removal of plastic exudation from the pleura; and if this be true, the question resolves itself into this: is, or is not, protracted duration of friction-sound of favourable signification ? I cannot pretend to supply a positive answer to this query; but I am disposed to believe that such protraction is rather a favourable sign than otherwise. At least, it is so in this point of view, that it shows greater freedom of motion within the side, than when, all frictionsound having.ceased, a more or less close and intimate agglutination (instead of a connexion by more or less loose bands) may be presumed to have been effected. The patient was very easily brought under the influence of mercury; half a grain of calomel given every fourth hour for two days, produced obvious effects. On the next day, the salt was omitted, and iodide of potassium was prescribed, which, in turn, was exchanged for salines on the appearance of the erysipelas. To what extent the mercurial action may have favoured the absorption of the pleural fluid, it seems impossible to decide. The contents of the sac had distinctly begun to diminish, before any constitutional effect of the mineral (quickly though this was induced) had made its appearance.