given before the accession of the sweat, may sometimes, by influencing the morbid action, prevent the discharge. The respiration must in particular be attended to; for, by breathing country and pure air, the action of respiration is more fully performed, and, consequently, the source of vitality is increased, and the effects of our other remedies are increased. The importance of a change of air can only be known by those who have observed how fast patients have recovered from operations when removed to the country, and clean lodgings, with well-aired beds, although before this they were daily sinking. Indeed no capital operation, which is likely to induce the suppurative action, ought to be performed, where cleanliness, and a free circulation of air, free from fœtor, cannot be procured. [42] Exercise may be used either on foot, or on horseback, or in a carriage; and its degree must be regulated by the strength. There are few patients who cannot bear moderate exercise (were it no more than walking half a minute in a garden), and who will not be the better of this. [43] Acids are supposed to check it; but they can only act by increasing the strength in a secondary way. [44] Sweating is perhaps to the general hectic action what the suppuration is to the local one; and, therefore, can only be stopped by influencing this action. It is not yet discovered that any remedy has a specific power of removing the hectic, or diseased formative action, more than the local purulent one[45]; and, therefore, we are obliged solely to trust to these already mentioned, which have a natural tendency to increase the healthy action, or induce one nearly similar to it, and especially to a proper local treatment, by which we remove the exciting cause. [45] A diet solely animal has been proposed in that peculiar species of hectic which accompanies diabetes; but whether it would be equally useful in other species remains to be determined. When these remedies fail, and the disease seems to continue, or increase, in spite both of general and local remedies, then we must, if it be practicable, remove the diseased part by an operation; and, in doing so, we must remember, that delay beyond a certain period is dangerous; because the general action becomes so rooted, and the strength so reduced, that recovery cannot take place. Operating in these circumstances, therefore, can only hasten death. The wound will not unite nor heal, and the general action will continue unabated.