Mifiellanea Curiofa. 195 



nions true, they are however defective, and 

 the Circular Motion of the Blood unprovided 

 for. 



By the way ©f Transfufwn, this great Pheno- 

 menon is naturally accounted for, and the Ends, 

 for which the other two Hypothefes were de- 

 vis'd, might both be anfwer'd with more cafe. 

 For the Hypericin Arteries tranfmitting their 

 Blood immediately to the Umbilical Vein, may 

 very eafily tranfmit fuch Nutritious Juices or 

 Aerial Particles, as are contain'd in the Bloodf, 

 along with it, without depofiting them by the 

 way. By this means fo much of the Impulfe 

 of the Mother's Blood is preferv'd, as fuffices 

 to maintain that languid Circulation which % 

 Fcetus enjoys. For the Blood being driven 

 through the Arteries of the Viems into the 

 Umbilical Vein, is convey'd dire&ly to the Si- 

 nus of the Porta, and thence by a fhort and 

 direcl; Paflage through the Cava to the Heart ; 

 where pafling through the Foramen Ovale to the 

 Left Ventricle, and through the Canalis Arteriofus 

 from the Rjght and Pulmonary Artery, it is all 

 deliver'd without coming at the Lungs to the 

 Aorta, and from thence again by the Umbilical 

 Arteries to the Veins of the Uterus, making a (ore 

 of Epicycle to the main Circulation in the Mo- 

 ther. 



As this Opinion is favour'd by the Structure 

 and Difpofition of the Blood- Veffels on both 

 Parts, fo there is nothing in it difficult to be 

 conceiv'd, or repugnant to Experience. Late 

 Difcoveries have made it appear, that the Ar- 

 teries and Veins are continu a Tubes, and that 

 the latter contain nothing but what they receive 

 from the former, and no Reafon appears why 



O z we 



