Hcemaflatks. S i 
will then immediately dilate, upon which the 
Orifice being inftantly covered with a Plab 
fter, the Man will then breathe as free as ever. 
Will ftrongly girding or compreffingche 
Abdomen do the fame thing ? 
7. But in cafe the Lungs themfelves are 
pierced with a Sword or Bullet, then this 
ftrainins; mufl: needs be hurtful, becaufe it will 
much increafe the EfFufion of Blood. 
8. Hence we may fee how dangerous it is 
for thofe, whofe Lungs are fo weak as to be 
fubjed to break, to ufe ftrong Exercife or Mo- 
tion ; for when a Man either Brains, or is 
ufing any violent Exercife, fo as either to 
have the Blood impelled more forcibly into 
the right Ventricle, or by running, (^c. to 
have that Ventricle beat inftead of fevency 
five times, one hundred and twenty times in 
a Minute, then the Blood muft needs be very 
forcibly impelled into the Lungs. 
9. In which cafe the Blood being greatly 
accumulated in the pulmonary Artery, the 
Lungs will eonfequently be conliderably d'w 
lated, fo as to fubfide but little in Expiration ; 
which may be the Caufe of thofe fmali but 
quick Infpirations and Expirations, which Mcii 
mstke in ftrong or quick Motions. This 
G whai 
