( 4^4 ) 
• much controverted, whether a Fatm does refpire while 
in utero materno, there being only a continued Circula- 
tion from the Mother to the Child, and from the Child 
to the Mother, by means of the Placenta and Cordon, 
fo that the Lungs of the Mother ferve for both, and that 
the Blood circulates a much (horter way by the Canal of 
Communication and ForamenOvale without pafling the 
Lungs, then it does after the Birth, the Child having 
then tlie proper ufe of its own Lungs, the former Paf- 
fage being fo Mechanically ftopt by a Valvule, that the 
Blood quite alters its former Channel or Courfe, as I 
have fcen it to my great Pleafure and Satisfaction, dc- 
monftrate on feveral Foetus's diikStcd on that account 
in the private Leftures of Moafieur Duf^erny. And that 
the thing may appear more clear, I fliall mention two 
Opinions that obtain moft as to the Nourifliment of a 
The firft is, That there are a number of Glands in the 
Internal Tunick of the Matrix, which all the time of 
Child-bearing filter and feparate from the Blood, a white 
Liquor, like unto Chile, that is received by the Glands 
of the Placenta (which is nothing but a heap of Glands 
and Veflels) that are joyned with thofeof the Matrix j 
hence ki Brutes th^ can feparate the Placenta from the 
Matrix without the effiifion of Blood, but only of that 
white Liquor, the umbilical Veins and Arteries being 
^iftributed to all the Glands of the Placenta ; fo that 
the capillary Veins receive that Liquor with the 
Blood, and carry it to the Fena Porta of the Child, 
from thence to the Heart, to be diftributed through 
the whole Body ; and what is fupcrfluous, is carried 
back to the Placenta by the umbilical Arteries, and fo 
continues to circulate from the Placenta to the Child, 
"&viceverfa. 
By the Second Opinion they pretend that the UiHbi- 
lical 
