1 lO 
VEGETA B.LE STRUCTURE. 
yet come into the Seed-Veffel, take their firft growth j which forms the 
protuberance feen in the perfecft Seeds, and gives the Embryo all its coats, 
and Seed-Leaves. This done, the Juices no more flow into the Seed-V eflTel ; 
every thing hardens ; the Seeds in time become loofe, dropping off from 
the Column ; and the aperture by which they communicated with the in- 
fide of the Column, contradts in the manner of a fear j but ftill there is - 
a little opening left ; which glafles will difeover ; and out of which the 
Plant afterwards flioots. 
Thus is the Seed of the Radifh formed, including a minute embryo of 
a new Plant ; whofe progrefs in growth we are next to trace. This will 
be an eafy talk, the object being large enough for the naked eye to exa- 
mine, and even the whole flrudlure plain to very fmall powers of mag- 
nifying. 
CHAP. XXXI. 
Of the Growth of the Plant from the Seed. 
H E ripe and perfedt Seed of a Radifli is compofed of four parts. 
I. A brown hard Shell or Rind, a. 2. A yellowifli pulpy fubflance, 
formed into two doubled flat plates, appearing four, b. 3. The Heart of 
the Seed, which is the Embryo conveyed thither from the Farina, c. 
And 4. A fine thin white Membrane, d, placed between the Embryo 
and the Shell, in that part where the Seed originally adhered to the Co- 
lumn while it was in the Pod ; this is now continued as a covering to 
the Embryo to the place where it joins the two inner plates. The Seed 
cut afunder tranfverfely, is reprefented at Fig. 35 ; the ledtion being made 
near the place where it grew to the Column; in this we fee diftindtly all 
the parts, a is the brown Rind ; b the outer folds of Plates j c the inner 
folds, fmaller, and gathered clofer round the Embryo ; d is the Embryo, 
and e the fine white Membrane torn from the place where it adhered to 
the outer Shell. 
There is a little hollow about the Embryo, and its fmallefl: end flands 
toward the furface of the Seed, covered with this Membrane. With care- 
ful management we may feparate this Embryo from the Seed: we then 
find it a fmall oblong body, pointed at one end, and the other fpreading 
into thofe two plates which run from it on each fide, and terminating be- 
tween them by a fmall curled head. The entire Embryo taken out of 
the Shell is reprefented at 36, and opened at 36, where we find 
plainly 
