(840 
(^Senn. the (v) Pudettdi C laufnr a f^omQtimes happening in both 
4"part^r. Sexes, demoftrates that then at leaft, the Urine cant 
fe'a. i.cap.pafs through the Urethra. 
'utunc. C^^ Dioni not finding any Allantois^ nor an Vrachus 
Lib. i.cap. plainly pervious, thinks there is no need of either,on an- 
5- ^ other account. For he fuppofes that the Blood, which 
l^^i^^^ ferves for the Nutrition of the Fetus^ is depurated from 
all Excrement. But I cannot apprehend, what fhould 
make this portiori of the Blood and Chyle freer from Ex- 
crement, than the reft of the Majfk Sanguinca. There is 
indeed no portion of it, which does not contain parts un- 
fit for Ajjimilation and Nutrition, Our Author would 
have been convinced of this error, had he ever opened 
Ahonions of five Months old or upwards, their Bladders 
-being always full of Urine, and fome Faces conftantly in 
the Inteftines. Tis difficult to determine when this fepa- 
ration of Urine firft begins, but lam apt to think it much 
fooner than is generally fuppofed. Fig. the ^d is the 
Allantois of a very fmall Abortion, which I have ftill by 
me. Since all the parts are perfeftly formed before /;5^/- 
pergnatian, not very long after Impregnation they may be- 
gin to perform their Offices. No doubt they begin as 
foon as there is cccafion for any reparation, and a fepa- 
ration of Urine is neceiTary, when the Fcetus is firft 
nourifhed by the Umbilical Arteries, 
(x) Aqua- The Exiftence of an Allantois is denied by (x ) fome 
pend. Lib. ^]^q grant an Urachus^ but will have it convey the 
Faiiop/ Urine Xo between the Amnios and Chorion, (jf) Die- 
(y) Lib. I'/^erbroec^s opinion is fomewhat like tbis^ only he would 
HarV. have the Urine lodged between the Urinary Membrane 
deHum.&and the Chorion. Thefe men don't confider that the 
Ne^h!^" "^^^^^ ^bi^ ^^^^ would get into the Amnios^ as well as 
cap.a.V iht Succus Nutritius oi the Chorion^ whether imbibed 
from the Uterus by the Chorion^ or feparated by its 
ixi^^6,' Glands. Such a Succus Nutritius of the Chorion is grant- 
Graaf de Maintaiuers of the fore-cited opinions, as 
mul.org. ^ ^ ^ 
cap. 15 well 
