creted to the feveral Ufes, in the feveral Parts of the Body; and they should by Steam and Action be kept fo divided, and hindered from precipitating, stagnating, or coagulating; that as fome are fixed to the Parts, fecreted or born off, others of the fame Kind, fhould be fupplied by the Steam, by that animal Procefs from the Aliment in the Stomach and Guts. If the Blood were returned as hot as it goes to the outward Parts, the Heat would be augmented every Time it circulated, and it would be rendered fo thin, that the Steam would pervade and not circulate it, nor would the Corpufcles be of proper Magnitudes for Secretion. Perhaps this is the Reason why one's Pulse is not much heightened when one sweats in Bed. The Glands, whether they be a few together, or in large Bunches, muft have Ducts into them out of the Bloodveffels, or out of one another; fome of them may have Paffages out of the Bloodveffels, fome into one another, and all of them Mouths with fmall Valves, to open and discharge outward, or into the Mouth, Stomach, Guts, or out of the Brain, Lungs, Liver, Milt, Kidneys, &c. which are all compofed of, or full of infinite Numbers of Glands, and fecrete the feveral forts of Matter

Matter out of the Blood, moftly in Form of Steam; Part for Ufes of the Parts of the Body, Part for Discharge, as well as the outward Pores in the Mouth, Skin, &c. That there are fuch Glands and Juices fecreted inward into the Stomach and Guts (of which I fhall fpeak hereafter) is evident by their Difcharges in Vomits, Purges, Loofenefs, but moft demonftrably in the bloody Flux.

"Tis

likely most of their Ducts and Paffages divide the Juices by the Figures or Dimenfions of their Apertures. But there may be fome Ducts or Paffages, fo turned or bended, that they may admit Corpuscles which are round or angular, and not those which are smaller, but long, fibrous, or crooked, and fome the contrary. Suppofe there be Corpufcles, or little Maffes in the Blood of ten different Sizes or Figures, the ones leaft of fmalleft, and the tens thickeft or largeft, &c. And the Paffage or Duct into one Gland admit them all, and the Paffage out again into the Blood or other Glands, let go the nines, and all finaller by Degrees, that Gland or Veffel will be filled with tens. If the Duct into another admits fives, and all fmaller, and the Paffages out of it into the Blood, or into fmaller Glands in its

Şides or Valves, admit fours, and all fmaller, it will in Time be filled with fives, and fo larger or lefs, fmaller, longer, crooked, &c. down to the smallest Glands in its Sides or Valves. And the smallest Glands in the Valves or Sides of the greater, must discharge outward, or into the Stomach, &c. firft: and the finest Juices firft, and fo fucceffively to the Juices which confift of the groffeft or crookedeft Corpufcles or Particles in that Set of Glands at leaft; because the difcharging the Juices out of the Glands in the Valves and Sides, of the greater or more inward, opens the Mouths of them, and permits them to discharge. When the Steam is too ftrong, and that or any other Agent opens the Ducts in, or Parfages out too wide, they will admit or let go too large; and when the Steam is too weak, or the Parts fwelled or preffed by the Steam, extending the Sides of the greater Tubes, wherein the Ducts or Glands are, or any other Agent, makes the Ducts into, or Paffages out, too straight, they will only admit, and let pafs thofe which are too small, and not fecrete thofe of proper Sizes, or Figures, and they cannot execute the Offices of one another. If thofe which should admit tens only

admit

admit nines, the tens must all stay in the Blood, and the nines admitted there will be wanted at their Poft, and thereby in Time the Blood will abound with tens. If those which should only admit and difcharge ones, admit and discharge ones and twos, the twos will be wanted at their Poft, as in Fevers, when the Urine is red, &c. And 'tis likely the Ducts to, or Paffages out of the Glands to the Gallbladder do not fecrete, or the Bladder does not discharge, when the outward Parts are filled with that Juice in a Jaundice. If the Paffages out of the Glands into the Blood, which should retain but one fort, retain two forts, the two forts together will not execute the Office of the one fort. And Corpufcles of Salt of different Figures or Sizes, and different Quantities of the fame fort, or differently impelled, may open the Mouths of the Glands to different Degrees, when the Number of the Salts are but few or weakly impelled, they may open the Mouths of fome of the fmaller, and not be enough of them to open the Mouths of the larger. If the Mouths of the Glands be kept open after they have difcharged the Juices collected in them, they will discharge the Juices promifcuously

out

out of the Blood, which can pass their Ducts and Mouths without forting them. And 'tis very likely, the Ducts in, and Paffages out of the Veffels and Glands in Plants, divide, collect and retain the feveral forts of Salts, Juices, &c. which iffue out of the Earth into them after the fame Manner: fo that in Proportion to the Size, Figure, &c. of the Ducts and Paflages in each Plant, and in each Part of each Plant, as they grow or encrease, or as they decreafe or wither; and thereby alter the Dimenfions or Figures of the Paffages in the different Seafons, the Juices in each Part of cach Sort, are nearly the fame, fome Alteration being made by this or that Sort abounding more or lefs, by the Proportion of this or that Sort in the Soil, &c. And whether the Pores in fome forts of Stone, Vetal, &c. may not admit and retain fome forts of Salts, &c. I cannot tell, but the fame forts of Salts, &c. are frequently found in the fame forts of them. And those of fmalleft Pores admit and retain Fire, either in the Earth or open Air, fuch as Flints, &c. and fo of Wood, Oil, &c. and the Corpufules of Cold after the fame Manner. When any Body has a greater Quantity of Corpufcles of Heat or Fire not

clog'd