5. It is difficult to find an instance where the advantages of reduction have been more remarkable than in the preceding one. The patient had passed six days in pain, extreme agitation, and uninterrupted delirium: the foot was reduced, and these unfavourable appearances instantly vanished, and were succeeded by a state of tranquillity. Alarmed by such a state of things, the ancients would doubtless have proceeded to amputation. Let us examine into the motives which led Desault to an opposite line of practice, and then inquire into the cause of the success with which that practice was crowned. 6. Had amputation been performed here, it must have been for one of the two following reasons; 1st, for fear of gangrene; or 2dly, to remove the unfavourable symptoms that existed. The first apprehension would have been quite visionary, in as much as all the blood-vessels were sound. Would the second consideration have been any better founded? It was perfectly obvious, that the unfavourable symptoms which existed arose from the tension and overstretching of the parts, in consequence of the preternatural position of the bones of the foot. The indication was evident. Replace these bones in their natural situations, the strained parts will then necessarily become relaxed, and all the troublesome and alarming symptoms cease with the cause that produced them. Experience confirmed the justness of this reasoning. 7. But the mere replacement of the parts would be of very little avail, if it were not permanently maintained, and followed up by a judicious mode of treatment. Without such treatment there would doubtless be reason to apprehend all that train of troublesome consequences, of which authors speak in such frightful terms, and which arise, not from the nature of the luxation, but from the manner in which the patient is treated. A loose apparatus, incapable of preventing displacement, would allow the bones to be deranged anew, and to produce again an overstraining of the parts, accompanied with pain, swelling, &c. Irritating local applications, such as camphorated spirits of wine, &c. would increase these pains; emollients which are employed in other cases would keep up the swelling.