ii The Pre fac t. 
ry accurate and faithful accounts of the 
ftruCture of the parts, which they carefully 
traced, from their fir ft minute origin, the 
feminal Plants, to their full growth and 
maturity, thro ’ their Roots, Trunk, Bark, 
Branches, Gems, Shoots 5 Leaves, Blojfoms 
and Fruit . In all which they obferved an 
exact and regular fymmetry of Tarts moft cu- 
rioufiy wrought in fuch manner, that the 
great work of vegetation might effectually 
be carried on, by the uniform co-operation of 
the fever al Tarts, according to the different 
offices afjjgned them by nature . 
Had they fortuned to have fallen into this 
ftatical way of inquiry, perfons of their great 
application and fagacity had doubt lefs made 
confiderable advances in the knowledge of 
the nature of Plants* This is the only fare 
way to meafure the feveral quantities of 
nouriffment, which Plants imbibe and per- 
fpire, and thereby to fee what influence the 
different ftates of Air have on them . This 
is the likeliefi method to find out the Sap’s 
velocity ? and the force with which it is im- 
bibed: As alfo to eftimate the great power 
that nature exerts in extending and puffing 
forth her productions , by the expanfion of the 
Sap , 
About 
