H^majlatks. 3 7 
Veins, to prevent this Inconvenience, and 
that principally in the lower Parts of the 
Body, where they are nioft needed, efpecially 
in great Motions, and in exerting the mufcu- 
lar Force of the Body. 
Experiment VIIL 
j r I ^hE Blood having rifen fix Feet eight 
X Inches from the crural Artery of the 
Dog, Numb, I. and to the fame Height from 
the left carotide Artery of Numb, 7. in the 
Table, Numb, 12. of this Ey:periment VIII. 
I chofe to calculate the Velocity, ^c, of the 
Blood of this Dog, 
2. The Capacity of the left Ventricle of 
the Heart being injefted with Wax was found 
equal to 1.172 cubic Inch. 
5. Its inward Surface equal to eleven fquarc 
Inches, which multiplied into the perpendi- 
cular Height of the Blood in the glafs Tube, 
which was fixed to the Artery, viz, fix Feet 
eight Inches or eighty Inches, gives eight hun- 
dred and eighty cubic Inches of Blood, 
which pre(s on all Sides of that Ventricle, 
when it has contrafted juft fo far, as to fuf- 
tain and be equal to the Force of the Blood 
’n the Aorta, D 3 4. Thefe 
