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Though bleeding ought not to be performed in a state of crudity, yet even that does not hold always. For the circumstances will not at all times wait for concoction. So that if any person has fallen front a height, or has received a contusion, or vomits blood from some sudden accident, although he has taken food a little before, yet that evacuation is proper, lest if the matter settle, it distress the body. The same rule will hold in other sudden cases too, where there is a danger of suffocation. But if the nature of the distemper will allow a delay, it must not be done, till all remaining suspicion of crudity is removed. Upon this account, the second or third day of an illness seems most proper for this operation. But as sometimes it is necessary to bleed even on the first day, so it is never good after the fourth, when by time alone, the matter is either dissipated, or has corrupted the body; so that the evacuation may weaken, but cannot make it sound. But when a vehement fever prevails, to bleed in the time of its violence is killing the patient. Therefore an intermission(17) is to be awaited for: if it does not intermit, when it has ceased to increase: if there be no hopes even of a remission, in that case the only opportunity offered, though less favourable, is not to be neglected.