136 H<emajlatic$. 
pafs thro* them, as to Reftringency or relax- 
ing : And fuch Qualities of the Fluids mud: 
have very confiderable Effefts on the finer ca- 
pillary Veflcls, whofe Coats bear a much great- 
er Proportion to the contained fmall cylindri- 
cal Fluid, than in larger Vcflels. Tho* it is 
not to be imagined that the Effefts are fo 
fudden and great in a live Animal, as in 
thefe Experiments ; becaufe in a live Animal, 
the feveral Fluids which are taken in, are 
more gradually and in fmaller Proportion blend- 
ed with the Blood. 
5. 'Tis probable that fuch things as conftringe 
the Veflels in any Degree> do alfo proportio- 
nably increafe the Force of the arterial Blood, 
and thereby invigorate the Animal. For fince 
the more the extream capillary Veffels of the 
Arteries are contrafted, fo much the greater 
Force will be requifite to impell equal Quan- 
tities of Blood thro* in equal times j the Blood 
muft needs therefore be the more accumulated 
in the Arteries ; and being thus impelled thro* 
fmaller capillary Vcflels with greater Force, 
it v/ill thereby both acquire a greater Degree 
of Heat, and be alfo the more attenuated and 
digefted. 'Tis by this means that Bitters, fuch 
as Chamomel Flowers and the Peruvian Park 
may 
