3 < 5 o The Conclufton. 
vations give us any farther infight into the 
nature of plants, they will then doubtlcfs 
be of fome ufe in Agriculture and Garden- 
ing, either by ferving to reftify fome miftaken 
notions, or by helping farther to explain the 
rcafons of many kinds of culture, which 
long repeated experience has found to be good? 
and perhaps by leading us to make fome advan- 
ces therein : But as it requires a long feries and 
great variety of frequently repeated Experi- 
ments and Obfervations, to make a very 
fmall advance in the knowledge of the 
nature of vegetables 5 fo proportionably wc 
are from thence only to exped fome gradual 
improvements in the culture of them. 
The fpecifick differences of vegetables, 
which are all fuftained and grow from the 
famenourifhment, is doubtlefs owing to the 
very different formation of their minute 
velfels, whereby an almoft infinite variety of 
combinations of the common principles of 
vegetables is made 5 whence fome abound 
more with fome principles and fome with 
others. Hence fome are of a warmer and more 
fulphureous, others of a more watry, faline, 
therefore colder natures fome of a more 
firm and lading, others of a more lax and 
perifhable conditytion. Hence alfo it is that 
fome 
