H^majlatks. 169 
Arteries, from which they branch off, and 
fince the capillary Arteries are (Irong enough 
to fuftain the Impetus of the Blood in violent 
Exercifes without fwelling ; it may therefore 
reafonably be concluded, that Inflammatory 
and other Swellings are often owing to the 
Serum’s or Lymph’s being, on a Stoppage in 
the capillary Arteries, impelled with greater 
Force into thefe fecretory Veflels, which ea- 
fily dilating at each Pulfe, occafions the 
Throbbings of fuch Swellings : Which Swell- 
ings, compreffing the Blood-veffels as was ob- 
ferved in Exper, XVI. Numb, 3. the Blood 
muft therefore neceffarily pa(s the adjoining 
capillary Arteries with greater Difficulty, 
whence there muft needs be a greater Friction 
and Heat ; and this inflammatory Heat may 
arife to a great Degree, if the mucofe Coat 
of the VefTels is thereby rubbed off, when 
the Globules themfelves may alfo be ftripped 
of their oily Covering. Hence alfo on catch- 
ing cold thefe fecretory VefTels being too full 
for want of a due Perfpiration, may by com- 
prefling the capillary Arteries, caufe a fever- 
ifli Heat, as well as by difordering the Crajis of 
the Blood. Anatomifls have found on tying 
the jugular Veins of a live Dog, and thereby 
greatly 
