( - 2 / )

All things being thus preparcd, Fasten the Dogs on thelr sides towarefsone another so conveniently, that the Quills may go into each other. Af-ter that unstop the Quill that goes down into the first Dog’s Jugular Fein,and the other Quill coming out of the other Dog’s Arter j ; and by the helpof two or three other Quills, put into each other, according as therc shallbe Occasion, insert them into one another. Thcn siip the running Knots,and immediate! y the Blood runs through the Quills, as through an Artery,very impetuousty. And immediately, as the Blood runs into the Dog, un-stop the other Quill, coming out of the upper part of his Jugular Fein (aLigature being first made about his Neck, or elfe his other Jugular Feinbeing comprested by ones Finger) and let his own Blood run out at thefame time into Dishes (yet not constantly, but according as you pereeivehim able to bear it) till the other Dog begin to Cry, and Faint, and falltnto Con'vulßcns , and at last Dye by his side.

Then take out both the Quills out of the Dog’s Jugular Fein, and tyethe running Knot fast, and cut the Fein asunder, (which you may do wich-out any harrn to the Dog, one Jugular Vdn being sofficient to convey allthe Blood front the Head and upper Parts, by reason of a large Anastomosis,whereby both the Jugular Feins meet about the Larinx. ) This done, sowup the Skin and disinisi him, and the Dog will Leap front the Table andfhake himself, and run away as if nothing ailedhim.

In the performing of this Experiment, titele Circumstances are to be Ob-serv’d. i. That the Animals be fasten’d at foch a convenient Distance, thatthe Fein or Arter j be not stretched. 2. If the Pulse falls beyond the Quill inthe Jugular Vein, you muß draw out the Arterial Quill, and with a Probeopen the Pastage again in both of them, that the Blood may have its freeCourse.

2. Instead of a Quill, take a small crooked Pipe ofSilver or Braß, so Byflender that the one end may enter into a Quill, and having at the other D ' *°‘ p ' 5J5 ‘end, that is to enter into the Fein and Arterie, a small knob, and for thebettet fastening them to it with a Thred ; for this is much more easy to bemanaged than a Quill.

IV. i. It may be considered, in the Experiments of Transfusion, that theB’ood ot the Emittent Ammal may, arter a tew Minutes or time, by its Cir- fuGon of s'Moö;culation, Mix and Run out with that of the Recipient. Wherefore to be bj —astured in these Tryals, that all the Blood of the Recipient is Run out, andnone lest in him but the Adventitious Blood of the Emittent, two or three ormore Animals may be prepared and administred, to Bleed them all out intoone.

2 . It seems not irrational to guess aforehand, that the Exchange of Bloodwill not alter the Nature or Disposition of the Animals, upon which it Ihallbe practised; though it may be thought worth while for Satisfaction andCertainty, to determine that point By Experiments. The Case of Exchang-ing the Blood of Animals seems not like that of Graffing, where the Cyonsturns theSap of the Stock, Graffedupon, into its Nature; the Fibres of the

G g 2 Cyons