VEGETABLE STRUCTURE. 
Hitherto all the parts have kept their places, only the Cone has 
lengthened : but as they will be moved a little hereafter, it is now we are 
to afccrtain their original. We fee the particle, 34, which 1 have called 
the Annular Embryo of the Farina, is the original Rudiment of the new 
Plant : it has in the Seed fent off its two folded Plates, and has begun a 
little to extend the oppofite w'ay in length. It will be important to know 
at what point in the fucceeding Plant the growth began, which has ex- 
tended it fo far each way : and this mufi: be afcertained now. It is the 
part marked b in Fig. 36} c in Fig. 40 ; d in 41. This was the center 
of the original annular Embryo 34, the part d\ and this has in the fuc- 
ceeding growth to the fourth ftate, Fig. 41, extended itfelf in length in the 
Root downwards, tofeveral times its original bignefs ; and has made a very 
minute advance upwards, in the convoluted Header Bud; which is hither- 
to almofl imperceptible. 
After a little time the young Plant advances from the irregular forni' 
41, to the proper appearance of a Seedling. As we are to count every 
article of growth from the place of the original annular Embryo, it will 
be proper to mark that every where with fome one appropriated Figure as 
*. This is added to the 41 ; and by this mark we (hall know the fame 
fpot of origination in all the dates of the Plant. The hrfl advance the 
Embryo 41 makes toward a Seedling, is by the expanding, feparating, 
and, in fome degree, railing the two folded Plates, which w'e are now 
to call Seminal Leaves. This is naturally tranfaded juft at the furface of 
the ground, or, as we may fay, between earth and air. The Pla‘es now 
fliew their true form, being broad, fliort, and dented at the end ; and 
they now begin to fhew alfo their green colour. See P'ig. 42. The point 
of growth *, now fwells a little, and juft upon its fummit, between the 
bales of the two Seed-Leaves, appears the Bud. 
The growth from this date is quicker than before, and the Plant in- 
creafes very condderably ; the perfed Seedling is reprefented at 43 : and 
from the former courfe it will be eafily underdood how it has acquired 
this form. The part which in 41 was under the earth, and in the 
date 42 had reached the furface, is now raifed condderably above it. If 
the line a be made the furface of the ground, this will be underdood 
perfedly. We are not to fuppofe the Plant has yet any Stalk. The feat 
of growth is at * ; and tho’ a part of the Plant is railed above the ground, 
yet we know this is the point of didindion between Root and Stalk : from 
this point * downward, is Root ; and from this point upwards, is Stalk ; 
no matter where the furface of the earth comes. 
VoL. I. 
The 
