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jiCommuM*. XXIV. In the Di flectiern os a Woman, who Dy’d forne few Days aster»iono/»frf Duct«! fhe was brought to Bed, M. Gayant having discover’d rh e DuBus ThoracicusS°EmuigeM upon the 7th and 8th of the Vertebras defcending from the Back, inferted aveinjfyM.rec-Q^ U J21 i nto rbe said DuBus, and having ty’d it upon the Quili, he did blow'J U "äi.”’ into it: whtreupon the DuBus war fill’d with Wind from the Quili untothe Subclavial Fein. This Wind iflüed at the ViscesidingCava, which hadbeen cut: To prevent which, I comprefled with my Fingers the Vena Cavaand the DuBus Thoracicus together, and M. Gayant having blown afrefh in-to it, we perceived that the Emulgent Vein was, on the Lett Side, fill’d withWind, and that thereupon the Body of the Vena Cava also fill’d itself fromthe Emulgent unto the Iliaques. This Wind feem’d to us to come from theLest Kidstey, and to insinuate itself into the Emulgent Vein, and thence intothe Cava. To ciear this the more we lifted with the Hand the Längs , thatfill’d the Lest Cavity of the Thorax, and having cleans’d this Cavity with aSpunge, M. Gayant did blow into th e DuBus lhoracicus , whiifl I comprefledthe Vem and th t DuBus with my Fingers upon the zd Vertebra , defcendingfrom the Back ; And we saw the Wind insinuate it seit under the Pleura , bya Trace, which raised it suddenly as olten as we did blow. This Trace ap-pear’d Irom the 41h Vertebra defcending into the Diaphragm , and made usconclude that there was under the Pleura a Channel of Commerce comingfröm the L'uäus Thoracicus , and pafling to the Emulgent Vei» by this Cavityof the Thorax.

vu i» Seil This Channel of Communication, we perceived to come from the DuBusxxv, 1, f. Thoracicus , at the place of the 4th Vertebra ot the Back. But to be Ihrer of

it I comprest with my Fingers the DuBus upon the 5 th defcending Vertebraof the Back ; and M. Gayant having blown into the Quili, which was up-on the yth, the Wind passed not to th cKtdney, nor to the Emulgent Vem ;Which made us conclude, that the Communicatio» was not benearh the $thVertebra. Then I comprefled with my Fingfrs the DuBus Thoracicus andthe Vena Cava upon the zd defcending Vertebra ; and the Emulgent fwell’d.when M. Gayant blowed into the Quili: Which gave us more strongly tobelieve, that the place of th e DuBusThoracicus, whence goes the Channel ofCommerce with the Emulgent, was betwecn the zd and 5th Vertebra of theETack. And to beyet more aflured thereof, M. fjayant fplit the DuBus Tho -racictts upon the zd Vertebra of the Back, and having blown into it at theQuill, the Wind came out at the Axillary Vein, and the Afcendmg Cava ;but the Emulgesst swell’d not at all.

r Biood t*jfctb We also made the following Experiment, which feem’d very Curious:■»here the Air M. Gayant having blown into the Aorta, whereof all the Branches that had"mit not. been Cut were ty’d up, it swell’d immediately, and the Emulgent Arterygrew Tumid at the fame time: But the Wind, that was protruded thorowthe Emulgent Artery into the Lest Ridney , return’d not into the EmulgentVein ; which taught us, that the Biood often pafleth where the Air doesnot.For the Biood of the Emulgettt Artery , which goes to the Kidney, returns tho-row the Emulgent Vein into the Vena Cava, pursuant to the Rulesofthe Circu-latio»