The hygrology, or chemico-physiological doctrine of the fluids of the human body

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234 CHEMICO-PHYSIOLOGICAL Doctrine SPEcIF1c GRAVI TY : One ninth pars lighlerthan distilled water. Iis QuΑNT 1 TY is estimated at about eight potan is, in a moderate si Zed man, net ther Verysat nor very lean ; but the quantity varies in respect to sit uation, It aborantis particularly in ille common integuments. J here is a great quantity in the gluteimu es , and bursae offat are, here and there, solandbel een ille inuseses of the poples. The hemispheric figure of the fonale breos, and the mons neris, are mere fat. It is also in larse quantities, in the palm of the hands, and soles of the shet. There is notae in the viscera of the boad and thorax. The omentum has litile in iis natural state, butthere is, generally; a Considerable portiora around the intestinum renum, ' and stili more abolit the idii S.It is liquisied by heat, and congealed by col . Itis neilher distblved by ater, Diris of ine, sicit,

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of the FLUID. of the HUMAN BOD T. 23; It is dissolved by onuste tithali, and palles into an assaline γου by boiling ; whicli, is solubie in

uater.

It sornas an emplastric mass with the calces of melah, especialty of Dad. SPONTANEOUS DEGENERATIO N. Fat, exposed long to the temperature of the atmosphere, attracts the oxygene, and thense be comes rancid; for it acquires an acrid, bu ing lase, and a dis agree

able Deli, assecting the nostriis and eyes. Fromiis rancidity, the sebacic acid appears to bee volved, and the oti gradually to be de composed .

then gives olf an aciduloUS Water, empyreumaticoit, and a great quantity of inflammabie and Caria bonat ed air. The re maining mining incineraled carbone, leaves a s mali portion os pure and phosphoraled calX. The empyreum alio Oil is generalty thich, and concrete ; but by repe aled distillations is renderedihin, colourless, and more like an etheriat Oil;

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and is called the animal oil of Dipellius; whicli, unlesia very Caresully preserved si 'in the accessos air, in sione botiles, weli stopped, in a morttime loses iis White colom Is tallow 'be piat into a fi ying pan, exposed toa gentie heat, and mi Red with a third part os quic lime, by continuat agitation, a sebacic calx is sorm-ed stom me union of the lime with the acid of fat. This, boiled in twelve paris of water, and filtered, af rds a lixivium; whicli is to be evapora ted todryness, Ille rema ining sali calcineci, and distilled with half the quantity of the acid of sulphur the lime thus be comes united with the acid offulphur, and pure sebacie acid passes inis the

This febacic acii is an acid Uilli properties peculiar to iis eis, and is obtained frona the oti ofanimal fat. Iis lase is dis agreeable. Iis colour With al aline salts and assaline earths, it fornas neutral salts, whicli agree in many res pedis Withaceiated neutral salis.

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Vith alcohol iue, it fornas sebacic aether. Boiled with a. id os nil re, it is changed into acid offugar. It agrees Very much Willi acid os vinegar The CONSTITUENΤ PRINCIPLEs of animal fatiare, the refore, animal oic chemicatly combineduit Iesbacie acid, into a species of acidio . The Elemcntar ' principies of OIL, appear to be, carbone, combined by chemicat attraction withllydrogene, and matter of light, into one sub stance. The elements of sebacis acta, appear to bri Oxygene, united Mith an unknown acidisiable basis into salt. Perhaps the basis o this sali, is the gummous principie ; sor, by the acid of nitre, a Vegetableguna may be changed into the acid of sugar. USE OF FAT. The cellular membrane, in generat, iS the primarγ consituent principis of nearly

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238 The CHEMICO-PHYSIOLOGICAL Doctrine ali the solid paris; sor into it they are almost ali resolubie by maceration. Thus it constitutes the gure of ali the paris, and strenglliens them iniheir siuationS. The UsE of the o1 L, contained in the cellularmembrane, is multiplex.

thus every muscle, and each single libre, is involved in adeps. Thus macilent old mera are very inactive.

that the adeps is consumed by suppuration, the lin grows to the musicles, and they to thebones; whence mobility of the muscies is

lean peopte are more susceptibie of cold than sat: and in the extreme cold of northeria regions, birds and sistes are defended by agreat quantity of adeps: thias also, oily oint-

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4. It gives bilenos to the tender lin; for it is trans parent through it: thus the whitest paris are those Which have the greatest proportionos fui, as the breasts; and heiace insanis are

the bones projeet in an uncomely manner; and the lita not distended with flat, contractitato uiasightly wrinkles: thus in hecties, thebones of the cheeks protrude, and the lin ofmacilent old peopte is rugous, and olivaceOUS. 66. It defends sonae paris Dona compresson, like acus hion thus the nates of a man, accustomed to sit continually, are Very fat, to preVenti heir being hurt by the hardiaesis and frictionos the seat. 7. An oti, transu ling close to the hairs, throughille inorganic pores of the cutis, lubricates

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the sein, prevenis it Dona being di ted by theatri and preserves it clean and smooth. 8. Lastly, the adeps appears to be thie promptuarT, in whicli, animal oti, by means os animal gas,or carbonated hydrogene, whicli continuallyexhales Dom the arteries to this oll) is gradually converted into a nutritious,l; whicli, absorbed by the lymphatio vesseis, is carricilmith the chyle into the blood. in the foetusos four monilis instead os adeps, there is merejelly. Lastly, frona long continued Waut, leannesis of the body is induced

THE invisibie vapour, exhaling DOm the eX- ternat furface of the whole body. The SECRETORY ORGAN, is composed of the extremities of the culaneous arteries, Whicli perforate the suri ace of the 1kin and cpidermis, and diffuse a vapour into the atmosphere.

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r. A thick mis may be conspicuou θ seen, ascend-ing frona the whole sui face of the body of

pressed; and the dimini ed Weight, frona en creased perspiration. 4 he S MEL L iii an healthy man is, scarcely any, Or fatuous, is Called animal, and is percepti bie heia many men live or sieep together in a s malland confine i chamber. This sineti appears not Only to every man and animal, but also toeuch individual ; or the dog would be unable topui sti e the wild beast it had never Ihen, or to findhis tost master in a crowd of men.

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by the lin and Iungs, in this period, Will be sorty-

The Quantity, however, VARIES remarkably, respe fi to, I. Climate. In arm climates, more is perspired than in cola, here the excretion os urine is greater than that os perspiration. In temperate