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Show to J .l‘pcl‘llilflllit‘ instituted by HM Miderzzs, €55. liciem, usquc eas plexu minimarum venarum, injectione ccracca rubra tun gidarum, ubique tectas inveni, qnarum extreinitates in cavum vesicularum canalem delixa: huerebant.--Repctitum hoc cxperimcntum non semper mihi successit, sed pluries tamen, periculo in hoc t'et‘cptaculo seminis per injec- tionem facto, cventus idem labori rcspondit. "In cadavere \‘irili satis robusto, urinze vias indagaturas, vesicam per urethram inllare cottatus, omnis llatus per \‘cnas continue ex vesicae cavo rediit, ut vesica intlata mox iterum collaberetur. Studiosius in causam hu- jusmodi phmnotneni inquirens, aquam in \‘esicam per urethram siphonis ope inipnli, qum vero facillime ex vesiea in venas plexum vesete formantcs, et (-x his in truuncum venx hypogastrica‘, transiit. lnternc considerata vesica, nullo \‘illota‘tnnicae vitio laboravit, sed integcrrima ac naturaliter constituta Erprrinzvm's (Jammy "tiling [1211/ red Vtins do not absorb. place, he asserts that the blood of these veins, on standing, and in the dead body, either forms no coagulum at all, or a very small one; it would have coagulated in the arteries: it must have received some addition, some mix- ture must have taken place in the cavity of the veins, to have thus deprived it of its usual property. Secondly, he adduces the superior size and capa- city of the mesenterie veins, when compared with their corresponding arte- ries, as a strong argument in favour of their absorbing from the intestines, \Vhy are they so much larger, double, triple the size of the arteries, if they are not to contain something else than blood brought to them by these arteries, especially when the whole of the arterial blood does not come‘to them, as part is carried into the intestines in limit of a secretion.‘ The bile, others say, seen in the duodenum, is secreted in vast quantity, pt‘titis \‘icibus observavi." The same author informs us, that he saw a white lluid in the veins of the intestines in the dead body: " Lympha alba more than can possibly pass oil with the fences, but this bile is not found in the lactcals tinging the ehyle; what becomes of it? Bocrhaavc himself was inclined to believe, that, alter having served certain pnrpos ' in the ali- mentary canal, the greatest part of it was absorbed by the Veins, and cara ried back to the liver; and that the bile thus underwent, like the blood, in \‘cnis mesentern." circulation oi‘ its own. fun, tit itaque viam ex vesiea nrinaria, lluido vel aeri apertam, per vasorum venosorum ostiola patuisse nullnm dubium sit. In aliis, inllando aerem iti- dcm, sed lentius, pervasa ex \‘exica' Cavo viam sibi in vcnas qumsivisse rc- Baron lrlaller is also ol‘thc same opinion, and strenuously contends, that the veins certainly arise from surfaces by open mouths, and must be absor- hents, as the ancients asserted. " Neque raro \idi," says he, "ca‘rulcam ichthyocolam, qua: de venis C H A P. V. exhalcn'crat, pericardii figuram expressiSse. Et interum liguram ventricu- lorum cerehri glutino pistiunt per Venus impulso, non scmel conservatam \ idi, ut manifestnm sit, a veins in t'as omnes eavcas libcrtun iter C." erltun scrts, that he saw the injection run out of the orifices of the veins on the villi ml the intestines. Arguments have been added to these experiments. It has been urged, that veins are coiilcssetlly allowed, by every anatomist, to arise by open months from the cells of the corpus xpougiosmu urethra: and girl/15' {Ia/n" from similar cells in the i'li.‘<ii‘is and plums I'c/ijbrmis in women, as well as lrom the cells of the placenta. The saute thing is seen in the spleen of many quadrnpeds. The ingenious lloerhaave has also employed two other arguments in support of venal absorption in the intestinal tube: in the first place, Expert/21ml: zlemmzsh'ating that In] Vt‘ins ([0 not absorb. lymphatics, and IN consequence of his great attention to the. laeteals and early to doubt to anatomical injt: Lions in general, Dr. Hunter began Very . ‘ says, He Veins: red by n of the absorptio certain a absorb not did or did veins the " My only doubt was, whether my own observations on 111‘ " quantity, especially in the intestines-From not, and that there was no " jections, I should have concluded they did mescnteric yeins, otherthe and intestine an between " pa. age for liquors " wise than bv trar 4 dation. But authors of the best credit had given " such |
