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Show Conclusion of lbc First I'm-f. Conclusion (f tbs Firrt Parl. lacteals ; and whence it is again absorbed by the radiated extremities ofother from bleeding in the arm, where the flow of lymph was excessive, and could not be stopped but by the use ofa great quantity of vitriol-" plurimo vi~ triolo imposito." But he does not say that it coagulated on the surface of‘ the sltin. Diumerbroeck 53." in consequence of experiments made on the lymph in living animals, " Lympham ex vasis lymphaticis prope hepar aliisvc, in cochleari collectam, ab acre frigido in gelationem eoncrevisse, ct modo pellcd into, and mixed with, the blood in the veins. In the second place, the lymph is the fluid supposed, by the first disco- verers of the lymphatics, to he found only in them, and not in the laeteals, The and which occasioned their forming these vessels into two classes. truth is, the lacteals transmit ehyle, when there is any chle in the intesand tines; and at all other times either transmit lymph, &c. or are empty, do not transmit any fluid-The lymphatics commonly carry thelymph into the blood; but some ofthem may occasionally also convey the chyle, as I lymph, have demonstrated in the lymphatics ofthe diaphragm. Neither the then, nor the ehyle are uniform lluids, but liable to considerable variation, and absorbed only at particular times. I'Ialler, the most accurate of anatomists, says, " lit primum chylus per vasa lactea movetur, ct eeleritur quidem. Nam vulgare est, jam alias cita- subflavum, modo alium colorcm conquisivisse, non semel observavimus." -In the lymph I obtained from quadrupcds I never could perceive any taste or smell, nor any symptoms ofputretaction, after I had kept some of it for twenty-four hours in the month of June. The lymph is now coup inonly supposed to be the fluid absorbed from cavities and surfaces. Be« fore we can shew the importance ofits being absorbed, I think it necessary to say something of the structure. of these cavities and surfaces. Anatomists use the term rarity in a different acceptation from other peo- tum, spectaculam, chyli in vivi animalis lactcis v .5 conspicui, qui paulo ple. They speak of the cavity of the scull, cavity of the thorax, and cavity of the abdomen, as if they contained air, or a considerable quantity of post evanescit omnis, ut vel lympha stlccedat, vel inania vasa nuda supersint. \'idi etiam cartileo colore tincta vasa lactea perinde evanuissc. Et plied to each other, both in the living and even in the dead bodv. fluids. The truth is, they are Compleatly full, by their surfaces being ap- The vie im, cum in cisterna lymplia esset, lac in ejus locum successit et in tluctum thoracicum." And afterwards, to the same purpose, he adds, " In ductu thoracico t‘adeni phenomena vidi, et evanescentis chyli, et lympliee, term infernal XII/:fiIL't'J‘ would have been better than cavities-But, having qua: post album cliylum secuta est, aut alioquin inanem ductum replevit." eluding the cavities in the vascular system, the cavities in the hotly may said so much byway of explanation, without altering the usual language of anatomists, we shall give some general idea of these cavities.-VVithout in- In thepurest state that I could procure the lymph, I found it pOssessed be divided into those which contain the viscera, into the cavities of the It resembled water in fluidity, was transpa- rent, sometimes oi'a straw-colour, or even brown; it also either coagu- lated wholly, on extravasation, or coagulatcd in part, as the animal from which it was taken was either stronger or weaker. The same thing hap- pened in the dead body, where it coagulated from rest, or in consequence usually termed hollow viscera themselves, the cavities ofjoints, the cells of glands, and the cells ofthe cellular membrane. ofthe following properties. of death. Mr. IIewson says, that he has seen it coagulate round the edges of a wound received in the integuments, across the middle of the tibia, in the human subject, where the cutaneous lymphatics situated there were ac- cidentally divided, and which ofcoursc could not prevent their lymph from escaping at the wound. Haller mentions similar wounds of the lymphatics from There are some other cells, but I consider them as appendages of the vas- cular system; nor would I wish here to be understood as including the cells of bone. In the cavities containing the viscera, particularly those of the thorax, and abdomen, the surfaces of the cavities themselves, as well as of the contained viscera, are large, and allow of a considera‘ ble extent of motion between each other. These have no coinniu~ nication \tllll the surface of the body; and are every where imp: forated, except by the mouths ofthe exhalent and absorbent vessels. The cavities of 6"".13-‘li1-A'AA" tlnis alternately, till, having been strained through a vast number of small is protithes and cells, it is at last. thrown into the thoracic duct, and by it 103 M1‘,i 102 |