314 
VEGETABLE STRUCTURE. 
The original of a Stalk is the BuJ r, which has yet made no advance 
whatfoever toward rifing. Therefore in the Plant reprefented at 43, the 
part from * to b is Root ; that portion between a and is the Root under 
The earth ; and the part from a to *, is the Root above ground. The 
Bud, c, Rands dole upon the head of ihe Root; and the Seed-Leaves, ^^4 
having r'.fen on a kind of FootRalks. the Bud, c, is defended very finely 
by the hollow bales of thofe Footfialks where they lap over one another. 
The rudiments of thefc Footfla ks were always to be feen at their bafe, 
iho’ very fmall, and their extenfion in lengtli is from the mere afeent of the 
Sap. Thele Seed-Leaves are now at their perfedion and the next force of 
Nature is diredted to the Bud. 
TtiE advantages a Plant receives from the air are very confjderable, and 
they are obtained by means of the Leaves; which difeharge a great quan- 
tity of moifiure during the day, and imbibe a great deal during the night : 
the healthy Rate of a Plant always depends upon this, and in moR cir- 
cumRances its life, as we fee by taking oR' the Leaves of Trees and Herbs, 
during the feafon of their growth. The firR Leaves of the Radifli are 
thefe, and it is fo in moR other Plants. Till they obtain their Rate of 
perfedtion, the Bud makes no advance toward rifing. The Juices which 
have .been received from the earth, have fwelled the VeRels, expanded 
and enlarged the Seminal Leaves, and fent down the Root to fome con- 
fiderable length but more was needful to increafe the Bud, a communi- 
cation between the VelTels of the Plant, and the free air ; and nourilh- 
ment received thence; thefe Leaves are now in a condition to give it; for 
they are perfedl : therefore the Bud now begins to difclofe itfelf. To know 
how thefe two Seminal Leaves perform this important fervice, we muR 
examine their Rrudture. 
CHAP. XXXil. 
Cf the Structure of the Seminal Leaves. 
V'WE fee that what is called a Seed, independant of the original Embryo, 
' ' is a Riell, and nothing more ; therefore it is in the progreflive growth 
of that Embryo, we are to feek the whole fabrick of the fucceeding Plant. 
It was delivered naked into the Hull of the Seed ; there it got its cover- 
ing', and Riot out from the upper end two flat and folded Plates. Their ufe 
we fee now ; for in the fecond growth they are to become the Seed-Leaves. 
This 
