or out of the Guts into the Stomach, till fome Juice open the Glands in its Valves, or in its Sides, and by discharging the Juices out of them, weaken or extend them. Whether the Fluids in the Stomach fermented to such a Degree, or the Pancreatick or Gall, or other Juices out of the Guts, affift in opening it, I cannot tell; perhaps it may be opened by the Strength of the Steam in the Stomach, by extending the Stomach, and repelling the Blood out of the Tubes in the Pilorus to let the Steam pass into the Guts: But I think it cannot be opened by the Steam in the Guts to let it pafs into the Stomach. There feems to be a Neceffity that the Pilorus fhould be fhut and opened, for if there were not a stop there, the cool Drink put into the Stomach would run down into the Guts, and condense the Steam there; things digefted and undigefted, Lumps of Solids among the Fluids, would go altogether. And when the Steam in the Stomach grows weak, the Steam would arife out of the Guts, hinder it from contracting and fecreting Juices for fermenting and diffolving the Meat and Drink. When the Stomach is newly filled, and the Pilorus fhut, its Bottom will settle and hang lower down, and H 3 and the highest Parts of the Guts being extended by the Steam in them, will rife upward, and continue fo till the Juices discharge, the Ferment begin, extend the Stomach, and open the Mouth of the PiLorus. Whether the Steam in the upper End of the Guts can raise them fo high, that the Juices iffued from the Pancreas and Gall-Bladder, can run into the Stomach to affist in heightening or flackening the Fermentation, or for fome other Ufes; or whether that Pofition of the Guts can invert the Gall-Bladder, and make it empty; or whether those Juices are only iffued into the Guts, I have not had Opportunity to obferve. When the Pilorus opens, the Steam will iffue down into the Guts, and the Contents of the Stomach, which are thin enough, and above the Level of the Pilorus, will go. off into the Guts, and when the rest is as much digested as it can be there, the A-gents gone off, and the Steam abated, and the Cause which extended it weakened, the Air preffes the Blood and Juices into its Sides, and contracts it. The Preffure of the Air upon the lower Belly, and the Expanfion of the Steam in the Guts. below, jointly lift up the Bottom of the Stomach by Degrees, till it come to the Level Level of the Pilorus, and fo leifurely empties the Contents downwards, and contracts and compreffes the empty Stomach into a very little Compafs. The Sides of the Duodenum are thicker than the reft of the Guts, whether it be to refift the Sharpness of the Juices iffued into it, or the Strength of the Steam arifing in the Guts, when the Pilorus is fhut, or contract, iffued Juices, and extend, I cannot tell. When one has fafted very long, fometimes one lofes the fenfe of Hunger; a new Ferment rifing in the Stomach, and extending it: whether the Glands then discharge thofe Juices, and they work upon the Remains or Phlegm there, or whether fome Glands fecrete fome mucous Matter, which jointly with them makes a Ferment, and is defigned to keep in the Fire, I cannot tell: But if that go off the Stomach alone, it fometimes causes Colical Pains, &c. fometimes about an Hour after eating or drinking any fort of Matter, which irritates the Glands in the Neck of the Stomach, especially the Broth of stewed Beef, or fuch Things, which are full of Oil mixed with Salts, which fwim upon the Top of the Contents in the Stomach, or if one ride hard, or use Exercise which throws that Matter up the H 4 Neck Neck of the Stomach, it opens the Glands, and makes one puke fome of that Mixture, and fome time after eating Oil or fat Meat, one pukes fome of the Juices fecreted out of the Stomach, clear or unmixed, which induces me to believe, that they are fecreted out of the Glands above the Meat and Drink in the Stomach, and prevented from mixing by Oil or Phlegm fwimming at the Top of the Meat and Drink in the Stomach, and 'tis likely are intended to diffolve what fo fwims at the Top, and escapes the reft: For I cannot perceive how fuch a thin penetrating Juice could afcend from the Bottom, and efcape mixing with the reft: fometimes afterwards the Oil comes up mixed with thofe Juices defperately four, bitter, or, &c. I think the Guts hang upon the Mefentery, fo that the Sides of them are always full of Steam, and it is likely the Lacteal Veffels, through which it paffes, have their Mouths on the upper fides, and are thence continued into the Glands, and that the Steam can pafs along the upper Sides of the Guts from Valve to Valve, especially where the Excrements are fluid, and the Parts not contracted without pervading much of the Fluid. The two firft Parts, viz. the Duodenum and and Jejunum make fo long Bends, that but a small Quantity of the Fluid Mash descending from the Stomach refts in them, but falls down lower, fo that they are feldom found filled with any Thing but Steam, and the greatest Share of the Lacteal Veffels iffue out of the latter, which is another Evidence that the Chyle paffes in Form of Steam. The third Gut, or Ilium, hangs in fhorter Bends or Folds like Bags, fo that when they are filled with Excrements, and extend or hang down, they retain them. The fourth, or Cacum, hangs like a Branch between the Bottom of the Ilium, and Top of the Colon, and ferves as a Bag to repofite the Excrements which fall down the Ilium, till the Valve at the Top of the Colon open, and then the Excrements are discharged out of it into the Colon, after the fame Manner as the Stomach and other Bags, by the Expanfion of the other Parts lifting up its Bottom, &c. The fifth, or Colon, hangs in Bags much after the fame Manner as the Ilium, and is divided into Bags, by Ligaments or Strictures, and retains the Excrements much after the fame Manner, and prevents the fluid Mash from falling down, all at once towards the lower End, and preferves |