the Blood, when they miglit moi:e eatjly bavti been impart- 
ed i>y the plain fimple wiiy of Tran&futioo from tlie Arte- 
ries of the Mother to thQ Veins of the jfti*^^/. And, that 
this- is the courfe which Nature takes in this cafe, lam 
perfwaded from the eafinefs and fimplicity of the Method, 
which readily performs what might be perhaps in vain ex- 
peded from t other, and wou'd over and above find 'em, 
what they feem to grope fo blindly about for, a firft Mover 
of the Blood in a Fcetus. 
Thofe that contend for the conveyance of a Nutritious 
Jtiice, thro the Vp^hilical Ve'mitom the Placenta, areforc'd 
upon two difBeulties next to Abfu^dities. For firft, they 
are oblig d to make this Vein, which, as all other Veins, 
leems dedicated to the re-conveyance of Blood only, the 
proper and immediate Channel, thro which a very different 
Liquor is to be carried 3 and next to give a Power of At- 
traftion or Suftion to it 5' becaufe tht Nutritious Juice, 
which it is thus deftin'd to carry is both Vifcous and Stag- 
nant, and has neither force to drive, nor fubtilty to pene- 
trate, or infinuate it felf Into the Capillary Veins 5 and there- 
ffre muft be drawn or fuckt as Milk is from the Breajl, to 
which the Placmta and its Nutritious Juice are by the 
favourers of em exprefly compared. But it this were the 
fole ufe of the Place?ita^ and Umbilical Veffels, why 
were the Umbilical i4r/ene/fent along with the Vein? 
T|ieir bufinefs is not to bring any thing hack to the Fmus^ 
nor can they contribute any thing to the benefit of the 
M<3^^er- for the U^OT^^e Ariteries bring all to the PUcenta, 
the Umbilical Vein carries it to the Fostus, and the Uterine 
Vieins convey back again the Surcharge of th^ Mothers 
Bipod 5 the UmbilicaUr^mVj" only, have nothing to do, 
and are fuperflujous and impertinent, which is contrary to the 
conftant prafltice of Nature. Yet if Autopjte did in the leaft 
CQuntenance this HypothefiSj fome defence might ftill be 
made ^ ^but we find in the Umbilical Veif^ of a Fetus nothing 
bat J?w^^ a» in all probability it received im. 
m<?diately 
