Anatomy of the absorbing vessels of the human body

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Tbe Lymphatic Glands. 84 stantiam mnscosam plane singularem spongiosam tribuerit." Ruysch, I glands; have already said, admitted acini in the structure of the lymphatic but his acini belonged to the arteries, and not to the lymphatic vessels; be- sides, his acini were not like Malpighi‘s, hollow, but a globular subdivi- sion of arteries into minute branches. Haller says, " Et ipse Fredericus Ruyschius acinos nonnullos glomerulorum similes dcpinxit, vcrum caveos esse aut liquorem continerc idem negavit." IIaller describes the lymphatic glands, in one part of his work, as cellu- entur, ceterum arteria: eum cremorem in glandularum cellulosa spatiola de- ponant, minimm vero venae resorbentes eumdem resumant, inque secunda lactea sive in truncos cfferentes revehant."-From what has been said, it will appear, that it is no easy matter to unravel the structure of the lym- phatic glands. I shall faithfully relate what has occurred to me, having been very much versed in injecting these glands with quicksilver. If the glands are compleatly injected with quicksilver, and then examined in the microscope, it is certainly true, as Professor Mekel has observed, that nothing but convolutions of lymphatic vessels are to be seen in many in- lar, in the manner Nuck had described them, and admits their Spongy tex- stances,- but it is as true, that after the most successful injections of these ture, "ex libris non cavis reete fieri Nuckius docuit." He there speaks of their structure as very simple: " Fabrica milii valde simplex visa est, qnam insignitcr complicatam et diflicilem varii etiam bonae notae scriptores faciunt." And accordingly, speaking of the lymphatic glands of the mesentery and glands, the cells have been seen perfectly distinct. I have injected many glands, where there was not the least appearance of a convoluted vessel, and where the radiated branches of the inferens and efferens, with inter- mediate cells only, were to be found; but I never injected a lymphatic gland, where I did not see some cells, particularly ifI was attentive to the mesocolon, in one place he says, " Iterum ut vasa lymphatica ad suas glan- mercuryjust as it entered the gland. dulas ita ad mescntericas lactea se habent. Quando enim ad glandulas utriusve mcscnterii pervenerunt unico trunculo, aut potius pluribus, divi- duntur paritcr in ramos, inque cellulosam naturam glandulee ramos amit- Accordingly, one of the best me- thods of shewing these cells, is stopping the injection after the gland is half filled; the cells are then exceedingly evident. But if the injection goes on, the cells are covered over with ramifications of finer vessels, entering tunt ramosos tot et tantos, ut tota glandula in capellis etiam potissimum ampulla lacte plena videatur, neque facile sit acum figere quin de vulnusculo lac exstillet." Here every thing seems clear and easy; but in the very same page he says, "Difficile est dictu, num in ejusmodi glandula lactea vaseula continuo maneant, num potius chylus in cellulosam telam deponatnr, ct ex ea per ductus elferentes iteruni resorbeatur-anatome hic niliil definit." those cells, and injected contrary to the valves. 1 have injected these into the surrounding cellular membrane itself, in the human subject. In quadrupcds it is very easy to demonstrate the cellular structure: both in asses and horses the glands on the mesentery are mOst distinctly cellular, as will be seen in the annexed engravings. In the former, the cells are dis- tinct, without any other dissection or preparation of the glands than merely And in another volume of his works, still on the same sub- injection; but in horses it is necessary to dry them, and afterwards lay ject, he says, " Verum omnino dlfllCllC est dcfinitu, num lympha vasculothem open; the cells then appear like those of a honey-comb, and bristles rum advchcntium unicc in revchcntia rcsumta transeat, num potius in ali- sides, for and against the cellular structure of the glands, he then endeavours to reconcile them: " Neque impossibile videtur utrarnque senten- tiam conciliare. Cum enim in omnibus glandulis conglobatis paritcr in mesentericis juniorum animalium succus serosus etiam lacteolus sed tenuior reperiatur, potcrit fieri ut lactca quidem vasa prima cum secundis continu- entur, may be passed from one set into another, by lateral perforations, as is seen in the plates. When there is but one vas inferens and one efferens, there is but one set of cells; but when there are many, each appear to have their proper cells; and these cannot be injected from the other cells, but only by their own inferentia. It has been alleged by some, that Cuttingintoalymphatic gland, and observing the appearancc of cells, is no proof that it is actually cellular. In this -= swt as» - quas glandularum cavcas prius effundatur, ex quibus per revehentes ductus resorbta exeat?"-And, having at last adduced the authorities on both "‘ sf.» : way u 85 1725 LyIILp/Jzzz‘ic Glands.