46 
Hamajiatics. 
Aorta, defc. afcend. 
20. In the Mare — 1.036 — 0.677 — 
Ox —1.539— 0.912— 0.85 
Sheep —0.172—0.094 — 0.082 
Doe — 0.476—0.383 — 0.246 
1 y? Dog — o. 196—0. 1 06 — 0.075 
Dog — 0.196 — 0.125 — 0-093 
7//&Dog —0.179— 0.109 — 0.085 
by computation 
from five above 
found Propor- 
tion of Flefh in 
the hinder and 
fore parts. 
0.41 i 
O 056 
0.057 
0-234 
>0.065 
21. In this Table we find that the Areas 
of the tranfverfe Scftion of the defcending 
and afcending Aorta's of the firft Dog are 
nearly proportionable to the Weights of the 
refpeaive Parts which they fupply with 
Blood 3 and that in the Mare and Doe the 
Difference is not great, but greater in the Ox 
and Sheep. In Eftiniates of this kind great Ac- 
curacy in the Proportions is nottobeexpefted. 
22. The Velocity with which the Blood is 
thrown out of the left Ventricle, being per- 
formed in one third of the time between Syf^ 
tole and Syftole, the like Quantity of Blood 
would move with an equable Motion, of one 
third of that Velocity, thro* the Orifice of the 
Aorta in the Space of Time between each 
Syjlole. 
25. Since in a Man a Cylinder of Blood 
of the Diameter of the Orifice of the Aorta 
and 7.5)2 Inches. long, is at each Pulfe im- 
pelled thro’ a dilatable conical Artery, its 
Velocity 
