Hcemajlatics. 45 
17, So that notwithftanding the arterial 
Blood of a Horfe is propelled with a greater 
Force than that of a Man ; yet it moves the 
flower in the Horfe on account of a greater 
Number of Ramifications, and a greater Length 
of Veffels in the larger Animal. 
18. When I compared the Proportion, that 
the Area of the tranfverfe Se£fions of the de- 
feending Aorta bear to the Flefli and other 
Parts which they fupply with circulating 
Blood, I found it to be as follows, having 
cut the Body of a Dog afunder at his Heart, 
and firft weighing each part feparately, and 
then boiling them fo as to fepafate the Bones 
from the Flefli 5 the Weight of the Bones bc« 
ing deducted from the Flefli, the Flefli, 
of the hinder part was found to weigh de» 
veil Pounds eleven Ounces 5 that of the fore« 
part feven Pounds two Ounces. 
Now the Areas of the tranfverfe Sec^ 
tion of the Arteries of thefe five Animals arc 
by Meafurement as follow, viz. 
zo, la 
