Posthumous tracts

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of the body by iis reditess alone. The vesseis through Whichil runs are the arteries and Veius. The beari, comprising the two auricles and the two ventricles, is the sirsi and last tertii, or the Stisting potni and goal, Where both the blood and the Vesseis meet. The circulating current runs from the lest ventricle of the heari to the great artery or storta, and to the lesserarteries; hom the arteries to the smallest vetiis, and to the grand vel 11; Dom the vetus to the right auricle and ventricle of the heari, and thetice, through the lungs, to the lest auricle. This circle and gyre constitutes the great sphere of the heari; and the vesseis collectively constitute the nrteriai und venous System, or the heari in the largest sense; for the heari is as it Were most present in every potnt of ali the arteries, and in every potnt of ali the vetus; the vesself being iis channeis os determination, or rays of Operation.

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ali denomina sed blood; but tho puro and gonuino blood is distinguished by iis intenso reduess. The blood is sui rounded by

bo8om, delatis more nηmerou8 Uan ue Ῥe ean ever dis- sver, Or Me min concelae. Thero is abundant experience at the present day, to proVethat tho blood globule is not uni rin, simple, or devoid of paris. Indesed it admits of resolution or disintegration. In the capillarius it noluntly dividos into tesser globules, and these intoleast, Whicli are so minute us to escape Our vision. When theblood is exposed to a moderato heat, and so distilled, it is converted into an ardent spirit, Willi Oils and phlegm; moreoveru hon the globule is resolved, it yields a large quantity of Volatile salts, Whicli crystallige under the form Os a regular Vegetation. The more considerable paris Whieli como OVer, areshewn by the microscope to consist os triangular and square corpusculos. TO this eXtent the high experience of microscopi vision has reatly penetraten. And We may augur froni it, that detulis more multiple and more perfeci stili, lio hidden in tholossor globules, and again in the least. These hoWevor We cannot oxpect to See distinci ly, for We are unable to Seo the globules that contain them; RS When We cannot See Some Smali insect,

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With tho blood-globulo; although Dom What ive have found and know it is sufficiently certain, that is nil iis contenis could bediscovered, and is it could be magnised to the fige of the humari brain, an infinity of ne v detulis Would come to light, undnevertheless an infinity Would stili rema in unseen. For thoblood is the repository and the seminary of ali things in thebody, and contains in stet Whatever has procedod it in tho Lingilom, and in potency Whatever comes aster it, or Will comensior it. For this reason it is, that the universat body is sicli When tho blood is sicli, and vice versa; and that in the greater Dumber of disenses, it is sufficient to find n medicine for thublood alone, to restore the body to health.

Six tesser globules have been actualty seen in One large blood globulo; and in deed the mode in Whicli they a re united, and the relative position Whicli they occupy to ench other, have

been described und draWn, and wax modeis representing the whole have been constructed. ΜOreover, the severat tesserglobules have been seen in the aut Os separating DOm the com-

pound body; in Whicli case their pellucidity Was manis est, andas they came aWay froin the red globule, they Were observed topenetrato the capillary Ve8Seis. Furthermore experienee has SheWia, that these prior Or simpler globules are themselves divisibio into stili tesser ones, and even into least, Where sight cunfollom them no longer. Ait these particulars must be receivedas triae, because the observer,' and the Witnesses to his observatious, are WOrthy Os credit. ΝOW as the paris of the redblood admit os division into simpler paris, it folioWs that tholaiter, Whicli are the prior and simpler constituetits of the

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Besides the lesser pellucid globules Whicli constitute thelarge globule of the red blood, there are also in the blood, certain angular, Or Saline and enrthy paris. These also have been Seen and described, yet Only those that are square Or cubicat; the others perhaps being too minute for observation. It mnyhowever be inferred that ench red globule contains triangularas veli as cubicul forms, froin the consideration, that When thesix Iesser globules are in their fuit Whiri and speed os fluxion, they could not cohere together, Were there not intrinsie means

provided to strengthen and hold them in combination. Τheblood globules ure flexit,le and sost, and cap te of being eX- tendod in longili to tWo or three times their diameter. Andalthough they admit os being extended, and even divided, yetthey are ali os equat sige. Whicli is a plain enough proos, thatthey have Some fulcrum, Suppori and si , to ensure their cOhesion under the compound form. The particles of salis, both the primitive and the compound , are ungular sortiis; that is tosay, they are ineri and figured, Or consist os extremely minute trigons and cubes, hollowed out so as exactly to fit the convexityos fuerit and active paris; being made and formed Witti a vieWto combining or copulating With round particles, Whicli are thegentiane paris Os motion; to temper and moderate their activity, and to cause them to combine further, by SuccesSive degrees, into neW und more compound sortiis. Τlieresore in ordor that the fix globules may unite and cohere in One, they must have

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a littio cubo in the middlo With six fides and eight angies, and with ouch of iis fides hollo Ned ovi: and is any humor, hoWeverintense iis fluxion, comes into the mould of these holloW fides, it Will of necessity sali into globules, erecti Os a sige and eoΠ-Vexity ansWering to the fige and concavity of the fide. But tomatio the globules firm and tight, stili other and tesser paris,

and these of a triangular form, must be stted to the severatnngles Or angular interstices, of Whicli there are eight; and When these triangles are properly inserted, the whole Will thenbe a stabie compound. The cube in the middie Whicli serves asthe basement Or stylobate of the compotand globule, is no Other than a particle os common sali. The triangular formes arevolutile and urinous salis. Os the lalter the ardent spiriis ure composed, as Weli as nil the various species of Oils Whicli thoblood yields ou distillation. Ρarticles os the Liud soat about in the serum, and are thereby supplied or offered to tho blo d. And that these are indeed the constituents Which escape in large quantities Dom the blood When it is resolved or disintegraled, is clear Dom the crystalline vegetation Whicli they then go toform; also Dom the litile cubes that have been observed, Whenthis process talies place; and from similar cubes being found in the caput mortuum aster blood is distillud. And further Om the consideration, that Without an application of paris like What we have mentioned, composition Would be impossibie; and above ali, the red blood could never be the repository of the humors Whicli precede it, and the semina of those Whichsollos it. On the other haud, by the mutuat application Osthe triangular, cubic, and round forms, We have Dot only a firm and coherent globule, but one Whicli is spherical, volubie, sexible, fluid, adapted to any stratine8s of paSSage, Solubie, Tud in heaVy, Marm, and embracing the prior elements of the whole minerat und vegetabie kiugdoms; ali of Whicli in a moment Spontaneousty glide into one to form it, and it holds and keeps them nil on the happiest ternis of mutuat compaci, and arranged in the most admirabie oriter; While the spiritu ous Substance, Whicli resides in the lesser globules, is the single principie Whicli reigiis in the assemblage.

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crum consisting of a litile cubo With six fides and eight angies, and is each angular interstice Which is test belWeen the lesserglobules, have minute trigons and cubes inserted in it, that isto SV, Salin O-urinous particles-in this casu it is impossibio that reditess should not be produced. Color is the modification and Variegation Of the rays of light, and the rod species cannot fallto ariSe, WhereVer the rnys puss through an object thus regularly interpolated With trigons and cubes; sor as they fall,-as theyare incident,-they penetrate With perpetunt refraction to thelitilo cube Whicli fulsis the place of a centre, and there under-going repercu8Sion, they gyrate With a giddy Whiri a round tho Iesser globules Which lie at the fides. Thus much is known With certain ty, that nothing produces the various kiniis and forinsos sti aded light with grenter distinctiiess or in more eXquisite purity, than Volatile, urinous and aikaline salis, or than sulphurs, inasmuch as ali these are in reality triangular corpuscules, Or priSmS aud quadrangles, excavatest lateralty: Which When theyare distributen or packed in an orderly manner so as to 1 Orm a compotand body, are Sure to result in a generat modification oflight, either red, green, or yelloW, and to display a Sursace that is reatly distinet anu comprehensibio Only under the Condition Os a generat visual perception. The result is different When the proportion of light or rather Whiteness in the sphereis tess, under Whicli Circumstances green or blue are generaled;

but yelloW, When the proportion is greater. Τhis is proved by the transmission of the solar rnys through glass globes, throughbubbles of Water, und through steam, also through prisuis Variousty placed; by the phenomenon os colors in those places Where stiade begitis to be marked ly discriminaled by light; by various chemioni mixtures and precipitations; by the Wholevegetable Lingdom, so richly adorneli With colored objecis; and by an infinity os other instances; from a caresul sui vey Os all

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os Wllicli it is very clear that thero is nothing at ali rent' incolor. On the fame principies it is also evident Why the bloodis more or less red ut different times and in disserent individuulf, and why is it somelimes comparati Vely pale, yello' Ox green, or even tinged With unseemly blach.

The red blood is heavier thau Water, in Which When placedit siniis to tho bottom. The cause of iis gravity necessari ly lies in paris endoWed With vis inertiae and resistance, as are ali those Whicli are angular and terrestriat, or Which belong to the mineralliingdom. The force that determines the gravit ' of bodies ovidently resides in the purest circumambient atmospheres, Whicli press ali potuis of non-elastic hodies With perfectly activo force and unerring direction toWards the generat centre. Thus gravity or centripetency Originates Dom cosmical substances destitute of both gravity and levi ty. It solio s that the salino-urinous and volatile particles in the blood globules, of WhichWe spolie above, are the proXimate causes of the gravity of theblood. There re the quantity os these particles may be inferred from the gravi ty of the blood. And it Would be worthwhilo to institute a comparison belWeen Similar volumes of thered und of the purer blood. The heavier blood is for tho most pari harder, because impregnated With a Superabundance Ofearthy elements; While the lighter blood is relatively sost, asweli as tinged With a more gratesul redueSS.

In asserting that color is not reat, the author means that color is not a thing res, but the modification of a thing. - Tr. 9

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from disserent care8 8. Animal life in iis most essentiat form givos thu blood iis proper or peculiar heat, Whieli is intimately latent in tho fundamental constitution os ali iis paris; but this heat is a mild Waruith, Whicli Lindly and gently fosters the viscera, and lightsup the fires of est the laboratories scutiered through the system, for the due performance of their various Works. This is Some- times increased even to fervid intensity by the movements of the animus, or by disease of the body, and Withers the parchedand exhausted viscera. At other times it salis nitu fatis, ostento sueti an extent, that the members of the frame stitver Domiis absenoe. Thus as soOn as the blood is taken Dom iis native

Veiiis, it Ioses iis heat, and begitis to die, to be converted intoclot aud sanies, and to thichen into a viscid and pullaceous sit me. Τhe proper heret of tho bloost is then of tho mildest Lind; greater in youth than at Other periods, and even sensibieto the touch; but in iis infensu degree amounting to febrile

ardor. But there is no Leener excitant of heat than volatile urinous matters, such us lie in the bosom Of sulphurs, bitumens, resius, and of various hinds of WaX, Oil, Spiriis, nitres, and vegetabies. And there is nothing Whicli more speedily and naturalty promotes it, thau the auras of the worid, and their analogues, the spirituous suids of the animal Lingdom. ByConSequenee heat has no rendier generator than the blood, Whichlodges both the volatile urinous and sulphurous matters We linVementioned, and the animal spirit, entering into intimate unionand consori With them. Thus the natural heat increnses Withthe incrense of the spirituous suid, including iis volatile adjuncis, as during childhood; it decrenses With the decrease of the Same, iis in Oid age; it varies as the character of the bio dis altered by the vast diversity of causes Whicli affect it; 1t is perpetuated by the continuat resolution nud combination of the particles, as Weli as by the continuat exercitation of the blood by the bratiis. Τhus it appears that there is nothing real in heat, sire, flame, or colit, but that they are the assections and qualities of substances either vibrating and gyrating, Or on theother hand, at reSt.

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It is nos so weli established by microscopio observation, that the genuine blood is sost stud sexibio, und may be extended in tength to tWice or thrice iis bruadth, as weli as divided intoparis, that no room is test to doubt of the fact. The microscopisis have seen the bl ood globule in the capillaries compressedinto an oblong Or ovat figure, and ultimately broken up into anumber of other particles and globules. But is the proose WhichinStrucis us Os the sos iness, extensility aud divisibility of the globules of blood, be sufficiently ample to malle dolabi impossibie, We have to enquire into the cause of the phenomena. And here the fame experience sheWs, that the Iesser globules, of Whicli euch larger globule contains siX, ure the paris that

pressed. Hence the cause of the flexibility resides in the lessor globules, but nos in the salino-urinous and Sulphurous parti cleS, Which lalter are hard, ineri and passive, and only made HSe Ofas means os combination. Those tesser globules that constituto the purer blood, and those that constitute the animal spirit, areso sost and flexit,le as to yield to the smallest impulse, to theleast assallant force. The persection of the entities of nature 'spurer sphere lies in their pliabili ty, in their suffering and doing, undergoing passion and eXercising action, proportionalty and correspondently; or in representing the most perfeci forces of nature; Whicli cannot be done by hard ness and gravity, in-nsmuch as hard hodies absorb anu extinguisti influences undforces; While On the other haud elasticity and a yielding nature, and pa8Sive poWer equat to active, suffer no force to be lost, butreceive it, and give it fortii again in ali iis integrity to the neigh-boring paris as Weli as to the universat volume. MOreover, is the persection Os the purer entities consisis in mutability of state, it solious that they must be sost, yielding and sexible; or actiVeto the fame degree as passive; OtherWise they could not accom-

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Inodato themsolves to nil the various forces; and the foui could netther feel, imagine, thinii, nor discriminate the minuto dinserenoes in represented objecis, Whicli are nil of them fornis :110ither could the animal spirit run through the sibi es, and detormino into aet Whatever the minit endeavors and Wishes. Theresere the purer blood and the animal spirit, Whicli is agnina simpler humor of the animal kingdom, are the causes of the

flexibility observed in the blood globules. Anii it is evident from this in What the composition Os the blood globules consisis.

in the vetiis and arteries remnins the fame notWith standing. This resolution and recomposition of the blood produces that circulation Whicli me term the circle os lise; a circulation fromthe vesseis to the fibres, and Dom the fibres to the vesseis. Thus

instance returus to iis sirst essetice and nature; nud Dom this again reveris to iis generat, Or to iis insi or ultimate forin. But When the compound body is dissolved, or the red blood dies, it does nos cense to exist, but alWays returnS to a pureriise, and is gathered to iis parent, the soles. So eneli momentiise and death alternate in us, and every particle of the blood represenis the generat condition of the body. Indeed Μ ore it not for the continuat dissolution and renovation of the blood, the Dod would be usui ess to the body. For Desii elements require to be constantly taken in to the System to compose thoblood aneW, as Obsolete and antiquated mutters are thrown Out. Τhorosore it is that the blood is alWays surrounded Qth anabundance of serum, to Supply and offer these elements. More- ovor it requires to be continuatly purifieii, to servo nil the usos Os animal nature, i.e., to give birili to the numerous humors