1 5 6 Hcemajlatics. 
81.5) Pounds, 0.314 part of that is 2,5.71 
Pounds, equal to the Force which an Inch 
Length of the Artery fuftained, when it burfl:. 
And its Diameter being o.i Inch, the one 
tenth part of 81.9 Pounds or 8.19 Pounds is 
the Force which was requifite to burfl: afun- 
der the Fibres in an Inch Length of the 
grcatefl: Seftion of that Artery. The Force 
of the arterial Blood in a Dog, impelling it 
but eighty Inches high in a Tube; this is but 
5^th Parc of the utmofl: Strength of the Ar-, 
rcry, an Allowance being here made for the 
Difference between the fpecific Gravity of 
Blood and Water. 
4. When the Velocities of the Pulfes are 
increafed by the brisk Motion of the Body, 
as in a Man from feventy five to a hundred 
and twenty, fo in a Dog from ninety feven to 
a hundred and forty two in a Minute, the 
Qiiantities thrown out of the left Ventricle of 
the Heart, cannot be proportionably increas- 
ed ; for the left Ventricle cannot receive and 
throw out as much Blood in each very acce- 
lerated Pulfe, as in the natural flower ones: 
Befides as the Force of the Blood increafes 
in the Arteries, fo will it on that Account 
pafs off the fafter, as alfo on account of the 
4 extream 
