S6 {idemafiatic$. 
teries by the pleurccic Heat 5 but it feems to 
be more probably owing to the Si'zinefs of the 
Blood, which on that Account paffing with 
greater Difficulty the capillary Arteries, it 
mud: confequently be more accumulated thcr-e, 
by the impelling Force of the Heart. So that 
if a glafs Tube were fixed to the Arteries of a 
pleuretic Animal, it would probably mount 
much higher than in a healthy State of the 
Animal, efpecially in the beginning of the 
Diftemper, before the vital Strength be im- 
paired. 
1 2. Thofe v(^ho(e Bufinefs it is to fpeak long 
aloud in publick, do very fenfibly find the Dif- 
ference before and after Dinner, in which 
cafe it is much more laborious to fpeak, the 
Lungs being incotiimoded with a greater 
Quantity of Blood then accumulated in the 
pulmonary Artery. 
13. And as it was before obferved that the 
Dilatation of the Lungs, greatly promotes 
the free Paffage of the Blood thro* them, and 
thereby the more invigorates and exhilarates 5 
fo we may obferve that thofe who in fpeaking 
in publick, habituate themfelves to fpeak with 
well dilated Lungs, do it with much more 
Eafe to themfelves, and greater Satisfaition to 
the 
