Hcemajiatics. 159 
fpheres, or to a Column of Water five times 
thirty five Feet high, that is, a Column a hun- 
dred and feventy five Feet high, yet this Force 
did not break the Vein, but one of the Ligatures 
failed. 
10. The Diameter of the Vein being 0.25, 
the Surface of an Inch Length of it will be 
0.785 fquare Inch, this multiplied by 76.1 
Pounds the Weight of a Column of Water 
whofe Bafe is a fquare Inch, and its Height a 
hundred and feventy five Feet, gives 59.7 
Pounds, the Weight which preffed on an Inch 
Length of this Vein 5 whofe Diameter being 
0.25 the Area of its greateft longitudinal Sec- 
tion is 0.25, fquare Inch, which multiplied 
into 59.7, gives 14.9 Pounds, the* Weight 
which the Fibres in that Seftion fuftained. 
11. The common equable Force of the 
Blood in the jugular Veins of a Dog, being 
about five Inches, this is but v^„th Part of 
the Force which this Vein fuftained without 
burfting. And if we fet the Force of the 
Blood in draining, to be twenty four, fuffici- 
ent to raife it twenty four Inches in a Tube, 
which was the Height to which it rofe, when 
the old Dog, Numb, lo. drained, fee the 
Table, p. 42. then this Force will be /,d Part 
of 
