PREFACE. tlx 
turn tnujl be regarded ; for the Inha - 
bitants of low, wet, fenny Countries 
often want Diaphoretics more than 
the Inhabitants of dry, rocky , parch'd 
Grounds. 12. In Acutes the "Ten- 
dencies of Nature toward a Crilis 
(hould always be confulted , but never 
oppofed ; e. gr. to attempt a Crifis by 
the Skin when Nature indicates it by 
the Bowels, or by the Bowels when it 
inclines to the Skin, would be unpar- 
donable and dangerous PraElice. 1 3. 
Differe?it Quantities of the fame Sim- 
ple produce different FffeEls. If Diu- 
retics are given in too large a Quan- 
tity, by putting the Blood in too great 
a Hurry, they prove Diaphoretics. 
Purgatives, given in too large a Dofe, 
by irritating too quickly, prove V 0- 
mits. 1 4. Different Forms alter the 
FffeEls of fame Simples \ for Elder- 
Bark, infufed or boiled, purges ; but, 
dried and powder'd, is only a little 
diuretic. Green Afarum Leaves , eaten 
raw, vomit violently , but their De- 
coElion , long boiled, is deobjlruent and 
b 2 diuretic . 
