they would not very eafily pafs a Valve, but that I think is fupplied by the Thicknefs of the Sides of the Gut, whereby the Juices iffued out of the Blood into the Veffels and Glands in its Sides, can shut or contract it clofe, and by iffuing thofe Juices extend it. Whether each Ferment in the Colon opens the End-Gut, and preffes the Excrements into it, or it is opened by iffuing the Juices out of the Glands in its Sides, deferves to be confidered; the latter I think is more likely, because if it were kept open during the Fermentation, the Preffure would be too great, and too long upon the Fundament. Tis likely when the End-Gut is full of Excrements, fuppofe half fluid, half folid, as the Steam goes off, and bears off the Fluid, the Top of it, at the Bottom of the Colon, contracts and partly fhuts, and when most of the Fluid is gone off in Steam, the Gut contracted, and the Fluid as it were squeezed out, and the folid Excrements formed in a Mould, the Glands in the Sides will be filled with Juices fecreted out of the Blood to be ready upon Occafion to iffue, extend the Gut, and difcharge the Excrements. That the End-Gut, and perhaps the Colon contracts, is evident by the hard Excrements of of the fame Man, moulded at different Times, of different Thickneffes; and 'tis more demonftrable in fome Brutes, where every Bag forms the Excrements into round Lumps, according to the Dimenfion of each Bag fo contracted, fometimes greater, fometimes lefs. Any fudden Increase of the Force of the Steam, fuch as when the outward Pores are fuddenly refifted by an Increase of the Preffure of the Air, or the outward Pores being fuddenly fhut by an Increase of Cold, or by the Emiffion of the Juices into the Stomach after eating, which may encrease the force of the Steam fuddenly, the Steam may prevail where there is least Resistance, and force the Juices out of the Glands into the End-Gut, and cause a Discharge of the Excrements. When the Steam is too thin, so that it goes off too quick at the Pores, its Force inward is not fo great, and one feldom has any Discharge then. Sometimes the Juices which open the Glands in the End-Gut and Fundament may defcend from above, as in a Purge or Looseness, or out of the Colon when the Juices fecrete in too great Quantity, or too sharp, raise too high a Ferment there, and open the Glands in the End-Gut. When that Gut When that at once, Gut is open, it gives Way for Excrements to settle down into it. and the Fundament both open both thick and thin go together, Steam within the Colon abate, outward Preffure of the Air drive in the Blood, &c. contract the End-Gut, and fhut the Fundament. When the Top of the End-Gut is contracted close or fhut, if there be any Excrements below, you may discharge them, if none, you may have the Piles, or discharge Juices or Blood. When the Fundament is not opened by discharging Juices, the Excrements may lodge in the End-Gut very large and hard, and you cannot discharge them. When there are Excrements in the End-Gut, and the Valves in the Fundament are weakened by discharging the Juices, if the Top of the End-gut be not open, and the Steam in the Colon be not pretty ftrong to prefs down the Excrements, the Discharge will be made with great Difficulty. When there is any Stop The Ocat the Bottom of the Colon, or the Top cafion of of the End-gut is contracted, fo that he ward and Excrements and Steam fill not the lover outward End of the End-gut, the Fundament will be preffed in higher than at other Times, which is a plain Indication, that the ReVOL. X. fistance the in Piles. 1 fistance within is weaker; and there be ing little Refistance within, the Air and Steam will prefs the Blood into the fides of the End-gut, and force the Juices into the Glands and extend them; and if it continue long, or be fo often, occafion the inward Piles; and if the Juices be falt or harp, they may fall down and reft upon the Valves of the Fundament, and caufe the outward Piles. If upon having a Stool, Part of the Valves of the Fundament be extended outward, the Juices will prefs into them, and form little Bags refembling Piles, and the Juices, will be discharged out of them outward; but if they be fpeedily put up with the End of one's Finger within the Valves that will be prevented. If the Steam in the End-gut be ftrong and refift them, fo that they are difficult to be forced up, or are pushed back, if you difcharge the Steam downward, they may immediately be put up easily. If the Parts be dry, fo that they will not flide up, a little Oil, Steam, the upon the End of the Finger, makes them Agent, flip up. The Veffels in the Side of the Contract Stomach and Guts, and the Valves in ing the.. them must be extended, and the space and the within contracted or shut either by Blood acts. and Juices preffed into them, or by ani Stomach, Time it mal mal Spirits or Steam iffued into their Mufcles (if they have any) and it must be done only when the Refiftance within is abated; I think it cannot be done by the latter, because we can direct the animal Spirits to act upon the Mufcles, and the Will has no Power there; befides they are frequently long in contracting, and continue long contracted, and I think the Muscles in any Part cannot be long extended, but the Force will abate. If the Steam be abated or condensed, or the Excrements difcharged fuddenly, the Sides of the Part will contract, and the Valve will fhut fuddenly, if leifurely, leifurely. But the Glands in the Sides of the Sto-. mach, Guts, &c. for fecreting Juices for Fermentation, &c. need not be fuddenly filled, because they are only needed upon a fresh Supply. Whether the Mouths of the Glands which contain the Juices for Fermentation, in the Stomach and Guts, be opened to fecrete them, by condenfing the Steam there, or by fome Corpufcles of Salt, or, &c. in the Aliment, or by the Friction of the Aliment upon their Sides by the Motion of the Lungs, Body, &c. till they raise a Steam, and whether that Steam extending the Sides of the Parts,. prefs out the Remainder of the Juices, or thefe I 2 1 |