pare, and feparate it, driving by their Peristaltick Motion the Chyle into the Lacteals, and the excrementitious Parts to the Podex, from whence there is no Regrefs, unlefs when the Valve of the Colon is torn and relax'd: But for the curious Structure of these Parts, fee more in Kerkringius, Gliffon, Willis, and Peyer.

That the Bladder fhould be made of a membranous Substance, and fo extremely dilatable, for receiving and containing the Urine, till Opportunity of emptying it; that it should have Shuts for the Ends of the Ureters fo artificially contrived as to give the Urine free Entrance, but to ftop all Paffage backward, fo that they will not tranfmit the Wind, tho it be strongly blown and forced in.

That the Liver fhould continually feparate the Choler from the Blood, and empty it into the Intestines, where there is good Ufe for it, not only to provoke Dejection, but alfo to attenuate the Chyle, and render it fo fubtle and fluid, as to enter in at the Orifices of the Lacteous Veins.

That in the Kidneys there fhould be fuch innumerable little Siphons or Tubes conveying the Urinofe Particles to the Pelvis and Ureters, first discover'd by Bellini, and illuftrated by Malpighy; that indeed all the Glands of the Body thould be Congeries of various Sorts of Veffels cur'd, circumgyrated, and complicated together, whereby they give the Blood time to ftop and separate through the Pores of the

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Capillary Veffels into the Secretory ones, which afterwards all exonerate themselves into one common Ductus; as may be seen in the Works of Dr. Wharton, Graaf, Bartholine, Rudback, Bilius, Malpighi, Nuck, and others. That the Glands fhould feparate fuch Variety of Humours, all different in Colour, Tafte, Smell, and other Qualities.

Finally, That all the Bones, and all the Mufcles, and all the Veffels of the Body fhould be fo admirably contrived, and adapted, and compacted together for their feveral Motions and Ufes, and that moft Geometrically, accor ding to the ftrictest Rules of Mechanicks; that if in the whole Body you change, the Figure, Situation, and Conjunction but of one Part, if you diminish or increase the Bulk and Magnitude: In fine, if you endeavour any Innovation or Alteration, you marr and fpoil, inftead of Mending. How can all these Things put together, but beget Wonder and Aftonishment?

In the Muscles alone there seems to be more Geometry, than in all the artificial Engines in the World; and therefore the different Motions of Animals, are a Subject fit only for the great: Mathematicians to handle; amongst whom, Steno, Dr. Croon, and above all, Alphonfo Borelli, have made their Effays towards it.

That under one Skin there fhould be fuch infinite Variety of Parts, variously mingled, hard with foft, fluid with fix'd, folid with hollow, thofe in Reft with thofe in Motion;

fome

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fome with Cavities, as Morteffes to receive, others with Tenons to fit thofe Cavities; all these fo pack'd and thrust so close together, that there is no unneceffary Vacuity in the whole Body, and yet fo far from clafhing or interfering one with another, or hindring each others Motions, that they do all friendly confpire, all help and affift mutually one the other, all concurr in one general End and Design, the Good and Preservation of the Whole, are certainly Arguments and Effects of Infinite Wif dom and Counfel; fo that he muft needs be worse than mad that can find in his Heart oto imagine all these to be cafual and fortuitous, or not provided and defigned by a most Wife and Intelligent Cause.

Every Part is cloath'd, join'd together, and corroborated by Membranes, which upon feveral Occafions (as Extravafations of Humours, Compreffions or Obftructions of Veffels) are capable of a prodigious Extenfion, as we fee in the Hydatides of the Female Tefticles or Ovaries, in Hydropical Tumors of the Lymphaducts, of the Scrotum and Peritoneum, out of the last of which alone twenty and even forty Gallons of Water have been drawn by a Paracentefis, or Tapping, for which we have the undoubted Authority of Tulpius, Meekren, Pechlin, Blafius, and other Medical Writers. What vaft Sacks and Bags are neceffary to contain fuch a Collection of Water, which feems to iffue from the Lymphæducts, either delacerated or obftructed, and exonerating themselves

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into

into the Foldings, or between the Duplicatures of the Membranes ?,

Thofe Parts which one would think were of little Ufe in the Body, ferving chiefly to fill up empty Spaces, as the Fat, if examined ftrictly, will be found very beneficial and ferviceable to it. 1. To cherish 1. To cherish and keep it warm, by hindring the Evaporation of the hot Streams of Blood, as Cloaths keep us warm in Winter, by reflecting and doubling the Heat. 2. To nourish and maintain the Body for fome Time when Food is wanting, ferving as Fewel to preserve and continue the natural Heat of the Blood, which requires an oily or fulphureous Pabulum, as well as Fire. Hence, upon long Abftinence and Fafting, the Body grows lean. Hence alfo fome Beafts, as the Marmotto, or Mus Alpinus, a Creature as big or bigger than a Rabbet, which abfconds all Winter, doth (as Hildanus tells us) live upon its own Fat. For in the Autumn, when it fhuts itfelf up in its Hole (which it digs with its Feet like` a Rabbet, making a Neft with Hay or Straw, to lodge itself warm) it is very fat; [Hildanus took out above a Pound and a half of Fat between the Skin and Muscles, and a Pound out of the Abdomen] but on the contrary in, the Spring-time when it comes forth again, very lean, as the Hunters experience in those they then take. 3. The Internal Fat ferves for the Defence and Security of the Veffels, that they might lie foft, and be fafely convey'd in their Paffage,

Paffage, wherefore it is efpecially gathered

about them.

By what Pores, or Paffages, or Veffels, the Fat is feparated from the Blood when it is redundant, and again abforpt into it when it is deficient, is a Matter of curious Enquiry, and worthy to be industriously fought out by the moft fagacious and dextrous Anatomifts. The Veffels whereinto it is received, and wherein contained, are by the Microfcope detected to be Bladders, and thofe doubtless perforated and pervious one into another; and though for their exceffive Subtlety and Thinnefs they appear not in a lean Body, yet feem to have been primitively formed and provided by Nature to receive the Fat upon Occafion. Why the Fat is collected chiefly about fome particular Parts and Veffels, and not others; as for Example, the Reins and the Caul, I eafily confent with Galen and others, the Reason to be the cherishing and keeping warm of those Parts upon which fuch Veffels are spread; so the Caul ferves for the warming the lower Belly, like an Apron or Piece of Woolen Cloth: Hence a certain Gladiator, whose Caul Galen cut out, was fo liable to fuffer from the Cold, that he was conftrained to keep his Belly conftantly covered with Wool. For the Inteftines containing a great deal of Food, thereto undergo its laft Concoction, and no Veffels of Blood penetrating it, and flowing through it to keep it warm, they had need be defended from the Injuries of the external Air, by outward

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