122 
VEGETABLE STRUCTURE. 
tery nouriflinient Is fecreted, and becomes In part the Juice of thofe Vef- 
fels. At the fame time the Veffels of the outer and the inner Rind hav- 
ing received, and feparated part of their Juices, deliver thefe alfo to the 
Veffels -of the Blea ; fo that in thofe Veffels is contained a fluid varioufly 
elaborated, and regularly mixed. 
These Veffels of the Blea fend branches without number to thofe of 
the Flefli of the Plant ; and from them, in the courfe upwards, a part 
of it is given to the Conic Clufters ; and in a contrary manner a part of 
that delivered from the Blea of the Leaves to the Conic Cluflers, is de- 
livered again in its courfe downward to the Flefh near their bafes. 
In the middle part of the young Plant is placed the fwelling 49, from 
whofe furface many of the Veflels of the Leaves aiife, and with whofe 
fubflance they all communicate. From the center of this fwelling rifes the 
Bud for the fucceeding Stalk. It is the middle point, to which nourifh- 
ment from both extremes is diredfed, and which at all hours of the day 
and night receives it from one or the other. 
Thus the watery fluid in the cells of the Blea is continually rifing and 
falling, according to the degree of heat j and that rich Juice feparated from 
it in the Veffels of the fame part, feeds the effential portions of the Plant. 
We have hitherto examined the preparatory parts ; we are now to trace 
the Bud up to a perfedl Plant. It has lain dormant hitherto i but the 
double fupply of nourilhment it receives, will now fet it to growing. 
CHAP. XXXIII. 
Of the Formation and Growth of the Stalk. 
■\^E have feen from the earliefl: flate of the Embryo in the Seed, to the 
full growth of the Seedling Plant, a finall Bud placed at the point*, 
or head of the Root : and while the other parts have taken fo much growth, 
this has had but little increafe. In the Embryo, Fig. 34, the point b fhews 
the origin of it ; and to the Fig. 94, it has made very fmall advances. 
At firft it appeared a fmall curled Bud ; as the Plant advanced it increaf- 
ed a little j and in the flate 42, where the Seed-Leaves want little more 
than their Footflalks, it appears fomewhat lefs compadl in its texture : 
when the Seed-Leaves have their Footflalks, and perform their office, it 
grows quickly : we fee it in one day increafe to three times the former big- 
nefs and open a little at the top. One day more enlarges it, and expands 
5 it 
