at length he came to ride twenty, nay thirty Miles a Day and as soon as he perceiv’d himself better after a few days tryal, he was Animated with the wonderfulness of the Event, and persever’d in the same Course for some Months; in which space of Time, he rode several Thousand Miles, as he told me himself, until he was not only well, but had acquired a strong and robust Habit of Body.” And Dr. _Sydenham_, tells us in the same place, that he Cur’d some of his Relations of Consumptions, by putting ’em upon Riding much, of whom he says, that it was altogether out of the Power of Medicine to help ’em. _Cum certò sciam me, vel Medicamentis quantivis pretii, aut aliâ Methodo, quæcunque demum ea fuerit, nihil magis iisdem proficere potuisse, quam si multis verbis hortatus fueram ut recte valerent._ A Clergyman, with whom I am acquainted, living in the Country, happen’d some years ago, to fall into a lingring _Diarrhœa_, which hung upon him some Years, and eluded the force of the best Medicines of all sorts, and brought him so low, that he had no hopes of Recovery left; when he was in this Condition, a Physician of the City advis’d him to try what Riding would do, not a slight tryal or two, but a close application to it; and his Physician told me himself, that he charg’d him to keep to a brisk Motion, and gallop as much as he could, enjoyning withal a very strict Diet, that if the Disease should be check’d by the Exercise, it might not by any improper Food, have occasion to break out again. He set upon this Course in his own Grounds, which are very large and spatious, and by these means was restor’d to perfect Health again. ’Tis manifest, this Case was a Colliquative _Diarrhœa_, which at long run had sunk all the Digestions and brought Nature into a kind of Universal Gleet, so that it came to be properly and solely the Object of Exercise; whereas a New _Diarrhœa_ or Dysentery, when the Humours are Turgid and Acrimonious, is solely the Object of Medicine, and so far from being to be Cur’d this way, that nothing would be more absurd than to attempt it; for ’tis the debilitated Fibres that Exercise restores, and immediately affects; and whenever Exercise makes an Alteration in the Fluids, it does so by the frequent Working and Constriction of the Fibres, which in a fresh _Diarrhœa_, before the Genuine Acrimony that occasions it is spent, would be to no purpose.