from what they are found in a State of Health; and that this Defect may be remov’d by this Exercise, seems not improbable, if we consider how immediately Riding affects those parts, that it acts as a Topick, by those infinite Succussions coming close upon one another, which must needs cause a greater Heat than ordinarily, and a better Mixture of some of the Similar Particles, and a Rarefaction of others, which after they are thus differently Modefi’d and alter’d, are many of ’em as it were chaf’d in again by that continual Agitation, and the Steam of their inflammable Parts is of Use, to keep Nature even under the Exercise; that there is something like this to be observ’d in the actions of the Bowels might be confirm’d, by what Glysters are known to do. I would not willingly verge towards the Fraud of an Hypothesis; I may be allow’d to have had some more than Common Occasion, to put me upon making these Observations, having some time ago been so unhappy as to labour under as severe a Flux, as perhaps ever was known, which held me about a Year and a Half, attended with Vomitings, and most unsupportable Nervous Symptoms; during all which time nothing reliev’d me, in the greatest Paroxisms of it, like gentle Riding, in so much that at last I was forc’d to be in a manner always on Horseback, to have the Pressure on my Bowels rebated, and my Spirits a little refresh’d. The Comfort which I found by that means, I think must be attributed to some such _Phænomena_ as I have above mention’d; for tho’ I will grant, that Riding was more beneficial to me under those Circumstances, than it would be to another, because of those Nervous Symptoms; yet how Particles so exquisitely Pungent and Acrimonious, should be retain’d and blunted and made useful, as appears from the Evil Consequences of too many Evacuations; how this should come about, but after such a manner as I have above hinted, I cannot understand; ’tis easie for those who think in hast and superficially, to be deceiv’d with the first appearance of things; but when once Men are calm enough, or under a Necessity to think closer, they are more likely to come to the Truth of such _Phænomena_ as these; and to those who do allow themselves to deliberate before they are Positive, I doubt not but what I have asserted, will appear reasonable; and perhaps I should not be so much out of the way, if I should add, that some of the _Stercoraceous_ parts of the Contents of the Intestines, are not in a strict Sence to be reckon’d Excrementitious or useless, since tho’ I don’t believe Digestion is perform’d by Putrefaction, yet I believe Putrefaction is a great Medium for the opening of Bodies, and the extracting inflammable Parts out of ’em; as we see a little Greenish _Hay_, when it comes to be Putrefi’d, shall become inflammable; and there being inflammable Particles in the Intestines, ’tis probable they may owe their Origine to some such Cause, and not to the first Chylification in the Ventricle. I