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Show a,,} T/Jr Lynp/m/ic Glands. Tim Lymp/mtic Glands, membranam, fibroso-tcndineum et interiorem glandulx quasi tendinem dis- tinguo, cui fibra: interna: inserantur, qua ad Nuckii dcscriptioncm cum ali- qua poetica amplificatione, tit ego quidem credo, fictze sunt." This coat gland appears like an oval lump of vermilion. 75 I have not seen the acini, described by Ruysch, in these glands; and it would appear, that Haller also had not seen them; for, speaking ofthis asserted discovery, he says, "lit nescio quos acinos preterea." But, as Ruysch had not seett themlin anv former injection, during a long life spent in making anatomical preparations; adheres to the substance of the gland by cellular membrane, which also connects the diliercnt \‘e 'cls and particular cells with one another. This cellular membrane is pervaded by a peculiar fluid, which Haller calls succus proprius glandularum. It is principally found in younger animals, diminishes as the body grows older, and at last totally disappears. It is of va- rious colours, more frequently white: I'lallcr says,-" Succum, glandulis tion from whence the engraving was taken to the great Boerhaave; and as Boerhaave has described what he saw by the microscope in these glands; I shall quote the passage 2-" Primo, quod arteriae mesentcriea: mittercnt ra- (:onglolmtis inesse album serosum lacte tenuiorcm, in juniore animali po- mos suos a diversis loeis versus unamquamque harum glandularum; ita ut tissiinutn conspieuutn, id quidem certum est, eum crcmori similem dixit non unus ramus peteret illam, sed varii et multi ab oppositis locis, ct quod oppositis etiam itineribus et directionibus decurrentes in glandulam irent unamquamque, Secundo, quod arteriae illae ita a diversis regionibus missat postquam tum venissent ad corpus illius glandulae, ibi quasi permiscerentur inter se, quamvis tamen manerent vasculosae, idque ubique et per omnes partes. Tertio, quod tandem subtilissima: facta: ita coniunderentur inter se, et innumerabiliorum flcxuum varieta'te in omni puncto intricarentur, ut comparari tantum potuerint cum glomerc multorum diversorum filorum in plexus inextricabiles intricatorum. Neque posse hic dici cum ulla veri specie, quod in membrana quadam ordinati hi eanales in sua serie sim- Thomas \Vharton, cinereum Malpighius, diaphanum Nuckius, album Mar- gagnius, recte, ct ad naturam ut puto, omncs." In the glands of the lungs it is of a blue or black colour, but then it is from disease. This lluid, in the microscope, appears to have globular particles in it, similar to those which by the same means we disem'cr in milk. It is most probable this lluid is there secreted by the arteries, and is totally (lit-Perent from the ab- sorbed fluids, or those passing through the proper cells of the glands. llad it been found only in the glands of the mesentery, we should have suspected it, both from its colour, and containing globules, to be the chyle; but it is found in all the glands, even in those which are at the greatest dis- tancc from the mesentery, and out of the road of the ehyle. Mr. Hewson suspected that these globules became afterwards the red particles of the blood. This he inferred not only from the globules, but also from the cir- etnnstancc of the fluid being in greater quantity in young animals, where as he has engraved the glands where he saw them ; as he sent the prepara- plici possint \‘idel‘i. Quarto, tandem quod inter lizec intricatissima vascula more blood is wanted; and its disappearing in old age, where less blood et tam subtilia multis locis hxreant parvi et multi distineti acinnli ut in he- pate. Et quantum oculus per microscopia assequitur, ipsi hi acinuli vi- dentur iterum conflari cx minimis pulposis extremis plane singularibus in sua fabrica canalibus arteriosis. Nee tamen potest vidcri quod hi acinuli membrana qnadam singulari ambiantur inelusi." Ruysch says, " Quando is wanted, where new parts are no longer forming, and the secretions jam clarius et perfectius vidcbam, haee omnia, prx gaudio exsiliebam." every where diminished, of this lluid, The arteries of the glands sometimes arise form one common trunk, which The veins of the mesentcric glands are as easily injected as their arteries, because, there, they have no valves. They come to the glands, like the arteries, from every quarter; are larger, and nearly as numerous. On enters at one end, and ramifies through the whole. This, however, is but the extremities, where the veins have valves, we have frequent opportuni- More commonly the arteries are many, and come to the glands ties of seeing them in the lymphatic glands, turgid with their own blood; by which means they become as distinct as if injected with a coloured fluid. There is something of convolution and interweaving also in the finer L 2 branches seldom. The fact is, we do not know what is the use from all the surrounding parts. These ramifications are so numerous, that, after a successful injection of these with size coloured with vertnilion, the gland |
