82 
H(£majlattcs» 
what thofe whofe Lungs are confiderably 
wafted or otherwife defedive are but too fen- 
fible of, even in a fmall Degree of Motion ; 
for in this cafe, the natural Courfe of the 
Blood thro’ the defeftive Lungs, being much 
retarded, there is immediately a great Accu- 
malation of Blood in the pulmonary Artery, 
occafioned by the accelerated Pulfes of the 
Heart : The Capacity of whofe right Ventri. 
cle, is proportioned to a found State of the 
Lungs, as all the Parts of an Animal, both fo. 
lid and fluid, are in a healthy State, admirably 
tempered and adapted to each ocher j bur in 
a defeftive Stare of the Lungs, they are too 
cafily furcharged with Blood, fo chat the un- 
happy Petfon is ready to be choaked; that 
is the Blood does with very great Difficulty 
and in but fmall Qiiantities pafs the Lungs, to 
fiipply the Demands of the left Ventricle of 
the Heart, without which Life inftantly ceafes. 
lo. There is probably alfo the like Accu- 
mulation of Blood in the pulmonary Artery, 
in pleuretic Cafes, when the Blood by its Sizi- 
pefs does with difficulty pafs, tho* impelfd 
with fuch Force as to diftend the VeflTels, and 
thereby caufe pungent Stitches. One reafon 
why the Effects of a fizy Blood are ufually 
6 fooner 
