PREFACE, xnh 
ufeful , than hurtful or fatal to them , 
while ■probably it is otherwife with the 
inferior , lejfer , and more obfcure 
Animals. 6. Even of the human 
Species there is a great Vi ariety of 
\ flafles , Appetites , Ages , and Co?iflitu- 
tions , to be Served ; hence a Neceffty 
of many different V egetables to gratify 
and anfwer them. 7. Had there jufl 
been the fame Number of Phyfical 
Plants created, as Mankind is liable 
to different Diftempers , and each 
Plant fpecifically adapted to its own 
refpe&ive Difeafe ; then , r. All Me?i 
mufl have been of one Conflitution, 
Habit of Body, had the fame Food \ 
and Ufe of the Non-naturals, inha- 
bited the like Climate and Situation , 
and followed a like Manner of Bufl- 
nefs and Rules of Life. 2. Every 
different Difeafe mufl have arifen 
perpetually , in all, from one and the 
fame refpeclive Caufe, and been at- 
tended in all with alike Symptoms f 
and been always of near alike Du- 
ration ; 
