VEGETABLE STRUCTURE. 165 
The Fibres being covered a6l more vigoroufly ; and foon the Particle, 
which we may now confider as the body of the Root, fwells : the increafe 
is inward : and in the third ftage, which a few days bring on, the tubular 
openings within, fend forth a Juice, as thofe on the furface firfl: did 3 and 
this fwelling and didending the Particle, forms, by degrees, a Pith. This 
is equally done in fhe body of the Root, (for fo we may now call the ori- 
ginal Particle) and in thofe Procefles of it which make the Fibres : for 
being two parts only of one fubfiance, the fame change happens at once 
in both. Thus we have the formation of thofe parts which are to be con- 
fpicuous in the future Plant. Thefe flages of growth are arbitrary ; and 
the progredion is very fwift from one of them to the other. But they are 
determinate, and didindl : and therefore highly ufeful. 
Let us remember that this original Particle which is to grow into a new 
Plant, was a part of the Flefhy Subftance of the parent Plant, terminating 
in a globule of the Farina ; there it was covered with a waxy matter ; 
and thus covered it was delivered into the fhell, which having received it, 
became a Seed. 
All thefe things are extraneous to it : they ferve for its prefervation j 
and nothing more. We have feen the Seed planted ; we have feen it burft; 
we have feen the original Particle delivered naked from it, after having 
firfl received the beginning of vegetative growth within it ; and we are 
now to follow it into the form of an entire Plant. Its original body dwel- 
led, and fet to growing, with a few naked Fibres produced from it, was 
the firfl: plain flage : yet this naked, and almofl fhapelefs morfel, was a 
perfedt Vegetable, capable of growth, and of producing all the other parts. 
In the fecond flage, we fee a white Coat formed to the dufky fpot j and 
in the third, a Pith formed within it. Three fubflances are already con- 
flituted : the whole Plant confifls of only four more, and they foon follow. 
The Blea is formed of the hardened Juice thrown from the ends of 
Veflels of the Flefhy Subflancej other fmaller Veflels of the fame fub- 
flance, whofe ends were not open, run into this Blea ; and take their 
courfe along it. Thefe unite the Blea to the Flefh, and one fyflem of 
Veflels ferves them, and runs thro’ them : and between thefe is formed, 
from the Flefh, the Vafcular Series. 
The Blea has its Veflfels alfo open upon its furface, and a Juice is dif- 
charged from them, jufl as was originally from the Flefli j only in lefs 
quantity. This covers the new-formed Body and Fibres all over; and 
condenfing afterwards it forms a new Coat upon the Blea. This is the 
inner Rind of tl]e entire Plant. Veflfels are continued out of the Blea into 
this. 
