c 4 MethodTransfusingBlood; bj» D\Lower. n. 19

3J2. U. 20.

?• zrz.

( 226 )

Coagulated the Blood ; I sound a greater quantity of Blood in the Heart o£another Dog, whom I treated aster the sime manner. The Hearts weremuch D.stended by the Blood found in them. I fhall therefore suppose that4 Ounces only were received at a time by these Hearts wichout Force, thatis Naturally. But Ifliall (üppose a Mardi Heart, (tho’ much larger, andhas much larger Veffels than thole I speak of ) to reccive but 4 Ounces ateach Diaßolc: and then Allowing 75 Pulses to every Minute, tbere willbe 4500 in an Hour, and 18000 Ounces of Blood transmiited in thattime.

Now is we (hall suppose that a Man's Blood bears the fame Proportion tohis YVeight, as that ot any of the aforesaid Animals had to its Weighr,which in a Lamb was the greatest, being is part, ic will follow that thequantity of Circulating Blood in a Man weighing 160 l. will not excted 8 l.or 118 Ounces ; according to which (Komputation the Blood will Circulate140 times in an Hour. But kt us suppose that instead of 8/. the MasiofBlood in such a Man be 12/. it will follow, that it will Circulate between93 and 94 times in an Hour. Frorn this Cehrity of the Circulatton es theBlood, we may give an Account of the Sudden Refelhon with Victuals, andparticularly iuch as are liquid ; we may also account for the quick palltngof Urine , from the fame thing; and also the quick Motion of the Chyleinto the Breaßs of Nurfes ; without sitpposing unknown Pastäges, from theStomach or any other part, into the Bladder and Breasts.

Anatomists commonly suppose no mcre than Half an Ounce of Blood to getinto the Heart at one Diaßole ; and the whole Quantity ©f Blood in theBody to be between 15 and 2y by which ic may appear how theirComputations and mine diffir.

of III. 1. First, take up the Carotidal Art er y of the Dog or other Animal,

r whole Blood is to be Transfufed into another of the sime or a different kind,

. and separate it from the Nerve of the Bth Bair, and lay it bare above an

Inch. Then make a streng Ligature on the upper part of the Artcry, not to

be untied again : but an Inch below, viz,. towards the Heart, make anotherLigature of a running Knot, which may be looftn’d or fasten’d as there fhallbe Occafion. Having made these two Knots, draw two Threds under theArter y between the two Ligatures ; and then open the Artery, and put in aQuill, and tye the Artery upon the Quill very fast by thosi two Threds,and stop the Quill with a Stick. After this, make bare the ßugular Veinin the other Dog about an Inch and a half long; and at each end make aLigature with a running Knot, and in the space betwixt the two runningKnots draw under the Veits two Threds, as in the other: then make an ln-cision in the Vein and put into it two Quills, one into the Defiendent part ofthe Vein, to reeeive the Blood from the other Dog and carry it to theHeart ; and the other Quill put into the other part of the Jugular Vein( which comes from the Head) out of which, the 2d Dog’s own Blood muftrun into Dilhes. These 2 Quills being pöt in and ty’d fast, stop them witha Stick, till there be Occasion to open them,

All