5 ^ 
VEGETABLE STRUCTURE. 
Juices to the Veflels of a Plant, but thro’ the fine pores of fuch a head ; 
and they are thence only given to the Veffels which run thro’ the Body. 
CHAP. IX. 
The Internal Construction of a Fibre. 
E have ken the Surface and the Termination of a Fibre of the 
Hellebore Root; and the dilTcdtion of that lafl part of it naturally 
leads us to the Anatomy of the whole. P'or this purpofe, we are to chufe 
an entire healthy and found Fibre, taken frefli out of the ground at the 
feafon named before; and to examine it by tranfverfe fcdions, and by 
fplitting. The parts arc mod: didindt in that portion which is next the 
body of the Root : therefore it will be bed to cut it afunder at about half 
an inch from its infcrtion. 
In a thin dice cut tranfveiTely from this part of a Fibre, and laid be- 
fore the Microfcope, we fee feven condituent parts very didindtly. Fig. 13. 
I. An outer Rind; 2. an inner Rind; 3. a vad white Blea, compofed of 
hexagonal Vefiels ; 4. a fingle feries of greenidi Vedels ; 5. a greenifh 
flediy fubdance ; 6. fix conic cluders of Vedels ; and 7. a fnow white 
Pith, formed of Vefiels extremely minute. 
So much a tranfverfe fedtion fhews. When we fplit the Fibre diredlly 
along the middle, we fee the fame parts didindlly in the fame proportion ; 
and on laying a thin piece of fuch a fcdtion before the Microfcope, we dif- 
cover the Vefiels of which each part is formed. See Fig. 14. — i, 2, 3, 
4 > 5 > 
These leven parts continue their courfe to the extremity of the Fibre, 
and rounding that extremity in fo many arches, return without interrup- 
tion up again to the infertion of it at the body of the Root. The next ob- 
fervation leads us therefore to that infertion. 
This is tlie plained that can be conceived. There is no Joint, no 
Knot, not fo ihuch as a Gland, or Ganglion, at the part : but the two 
Rinds, and the Blea, and Vafcular Series of the Fibre are continued plain- 
ly and fimply into the Rinds and Blea, and the Vafcular Series of the 
body of the Root. P'ig. 15, 16. e. Thus far the Root and its Fibre are 
one continuous and regular body : but the Flefh, the conic Clufiers, and 
the Pith, are difiindl in each. ’Tis eafy to fee now in what manner a 
I Fibre 
