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The Author’s Defign in this DilTertatlon is to coti- 
fider thofe Differences of a Human Body before and 
after Birth, which affed the Circulation of the Blood. 
And for this Purpofe he has given us 78 very curious 
and accurate Figures of the Parts relating thereto, 
fuch as the Heart, and Trunks of the great Blood- 
veffels, the Liver, the Vena ’^ortarum^ the Umbi- 
lical Chord, fubjoining to them a very minute 
and precife Explanation of each. Some of thefe 
Figures reprefent the Parts as they appeared imme- 
diately upon Diffedion, others as inflated and dried, 
others again as injeded with Wax; and laftly, others 
as having been firfl: injeded, and well dried, then 
cleared of the Injedion, and laid open, in order to 
Ihew the feveral Cavities and Valves in their natural 
Dimenfions and Pofitions. This laft Method he pre- 
fers to all the refl:, and obferves, with relation to it, 
that the Injedion muft not be thrown in too hot, 
and that the internal Parts of the Preparation mufl: be 
perfedly dry before we attempt to evacuate it ; inaf- 
much as a Negled of either of thefe Cautions would 
make the Valves, and their Membranes, Ihrivel up and 
contrad themfelves from their natural Sizes and Po- 
fitions, The Manner of doing it is to fufpend the 
Preparation in a proper Veflel placed in a gentle 
Heat, having firfl made an Aperture in the mofl 
depending Part, for the Injedion to run out at. 
From thefe Figures, with their Explanations, our 
Author draws the following Anatomical and Phyfio- 
logical Conclufions. 
ift. That, contrary to Cafferius's Figure, the Um- 
bilical Vein enters the Liver towards the Left Part 
of it. 
Kkk z 
