PREFACE, xxv 
approved Simples in the fame Cafes , 
as on Dropfy , Stone, &c. in the 
Notes. 
£ v~y~ ^v * * v * * * * i - • ■ 
Some may perhaps query , Why did 
the Deity crowd the Surface of cur 
Earth with fuch a Number of diffe- 
rent Sorts of Plants , many of whofe 
Virtues we are entire Strangers to, if 
they have any ; others we are uncer- 
tain of ; others the fatal Experience 
of many has proved to be certainly 
noxious ; and thofe that we are beff 
acquainted with, we cannot at all 
‘Times infallibly depend upon their fa- 
lutiferous Effects ; and, by late Dif- 
coveries from improved Microfcopes, 
we have Reafon to fufpeEl that there 
are yet many Genuffes and Species of 
minuter V egetables Jlill undifcovered P 
Had it not been much better to have 
garnijhed the Earth with juft fo many 
Plants as had been neceffary for Food 
and Phyfeck for us, and the Creatures 
fubfervient to our Ufes each Phyfical 
c Plant 
