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SECT. XII.

Which Straighten or fout the Paffages or Valves, when the Urine fecretes.

T

HE Extenfion of the Steam in the Guts, which compreffes the Kidneys, and straightens the Ducts, the free Paffage of the Steam, and Openness of the Pores, which discharges most of the Fluid that Way, Phlegm or any Sort of glutinous Meat or Drink, which fouls, or Salt, Gravel, Stone, &c. which corrodes or frets the Glands till they fwell, Abforbents or blunt Corpufcles, which hinder the Agents from opening the fmall Glands in the Sides of the Ducts. When the Steam is so strong in the Guts, that it not only prevails against the Preffure of the Air, but extends and ftretches the Muscles of the Belly outward very much, the Blood being refifted only by the Strength of the Preffure of the Air, and the Skin in the outward Parts, a greater Share of the Blood will pafs that Way, Hence the and lefs through the Kidneys. The Kidcommonly neys will be violently compreffed between called the the Sides of the Guts, by the Expanfion Gravel. of the Steam in them; and the Arteries,

Disorder

Windy

Veins,

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Veins, Ducts and Glands in them contracted and straightned, the Water will pafs thinner confequently, and in lefs Quantity. When any confiderable or total Stop is made there, or in any of the Paffages for the Urine below, the Bloodveffels are prefently filled too full, the Blood becomes of a Confiftency not fit for Circulation and Secretion, the Steam cannot get Vent for want of Space to move the Blood in, but recoils, throws up the unnatural Juices fecreted into the Stomach, caufes Vomiting, and at laft Fevers, &c. The Milt, or Spleen, seems to be under much the fame Circumstances as the Kidneys, liable to be extended when the Steam in the Stomach and Guts is weak, and compreffed when it is ftrong: Whether the Pain there be occafioned by its Extenfion, when the Steam is weak, or Compreffion, when the Steam is ftrong, I have not had Opportunity to obferve: Nor whether the Discharges out of the Pancreas be occafioned by the Weakness of the Steam in the Duodenum, and the Extenfion of the Steam in the other Parts, or by the Weakness of the Steam in all the Parts, or the Juices are preffed out of their Glands by the Strength of the Steam in the Stomach, or jointly L 2

in

in the Stomach and Guts. Whether the Liver, which is chiefly supplied with Blood by the Preffure of the Atmosphere, when it is compreffed by Steam, in the Stomach and Guts, ftronger than the Preffure of the Air, admit a due Share of the Blood to return from the lower Parts of the Body through it, or deny Admiffion, and keep the lower Parts extended and too full, or whether it then circulate a due Quantity of the Blood in itself, and fecrete a due Quantity of Gall, and whether, when the Steam within is weak, the Liver do not extend, admit a greater Quantity of Blood, and fecrete a greater Quantity of Gall, whether its Extenfion caufe not that Preffure we fometimes feel about the Stomach; whether it discharge the Juices out of the Gall-Bladder, when the Tenfion of the Guts is weak or strong, I cannot tell. But 'tis likely if those Juices be intended to encrease the Ferment, they are contrived to discharge when it is weak, if to abate the Ferment, to discharge when it is strong.

SECT.

SECT. XIII.

A State of the Operations in an healthy Perfon, how varied when empty, full, &c. In the various Pofitions of the Body in Reft, in Action, the various Effects of Meat, and Drink, compofed of different Sorts of Corpufcles, or differently freed.

WH

HEN you have an Inclination to eat and drink, you feel a Lanknefs, Laffitude or Feeblenefs in all the outward Parts, and a Gnawing or Sharpnefs within the Stomach; the first occafioned by the Defect of Steam to move the Blood quickly, and diftend the Parts and the latter by a brinous or falt Fluid remaining at the Bottom of the Stomach, which remaining in the Glands, and fecreting out of them, fall down to the Bottom of it, and raises the Sensation of Hunger, or what we call our Appetite. Suppose there is fome fmall Quantity of Phlegm lodged in the Stomach, or fwimming upon that brinuous Matter, that the Guts, or the feveral Divisions of them are partly filled, the lower Parts of undigefted

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fted crafs Matter in Form of Excrements, and the upper Parts of a thinner Matter compofed Part of excrementous Matter and Part of Fluid, and the uppermost Parts of Steam or empty, and the whole mixed with Salts, the Juices of the Gall, Pancreatick, &c. And that the lower Parts are extended with Steam, and hang in Folds or Bends, like Bags, and that the Stomach, upper Guts, &c. are lank, contracted and compreffed by the Extenfion of the Guts below, into a little Compass, suppose the Body standing, or fitting at Reft, the common Quantity of Meat you chew and fwallow, is mixed with the Saliva, goes down into the Stomach, and refts in a Mash upon the Phlegm and brinous Fluid, if there be any confiderable Quantity of the brinous Fluid, the Meat and Phlegm partly immerfes in it. When you have drank the common. Quantity of any thin Fluid fufficient to dilute the whole, if the Fluid be warm, most of the Oil or melted Fat (if there be any) rifes to the Top, most of the Phlegm next under it, next the Parts of the Meat which will swim in that Fluid, and next the Fluid with the Parts of the Meat near its own Gravity, hovering or fettled to the Bottom in it. If the Fluid

be

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