The Gonclufion, %6t 
fame nourifhment, is doubtlefs owing to the 
very different formation of their minute 
veffels, whereby an almoft infinite variety of 
combinations of the common principles of 
vegetables is made $ whence fome abound 
more with feme principles and fome with o- 
thers. Hence fome are of a warmer and more 
fulphureous, others of a more watry, faline* 
and therefore colder nature 5 fome of a more 
firm and lafting, others of a more lax and 
perifhable conftitution. Hence alfo it is that 
fome plants flourifh beft in one climate* and 
others in another ; that much moifture is kind- 
ly to fome* and hurtful to others $ that fome 
require a ftrong, rich, and others a poor,fandy 
foil 5 fome do beft in the fhade, and others in 
the fun, &c. And could our eyes attain to a 
fight of the admirable texture of the parts on 
which the fpecifick differences in plants de- 
pend, what an amazing and beautiful feene 
of inimitable embroidery fhouid we behold? 
what a variety of mafterly ftrokes of machi- 
nery ? what evident marks of confummate 
wifdom fhouid we be entertained with ? 
Wc may obferve that the conftitution of 
plants is curioufly adapted to the prefenc 
ftate of things, fo as to be moft flounfhing 
and vigorous in a middle ftate of the air, 
when, 
