VEGETABLE STRUCTURE. 
47 
fubordlnate Fibres; and the end is not diminidied into an invilible point, 
but has a fair largencfs for the view, and is terminated by a kind of but- 
ton, 4. 1 have added it dillincl, and a little magnified at ^9. 
The portion (i) is of the nature of the body of the Root. Its fur- 
face is entire and fmooth ; it receives no juices from the earth, hut con- 
veys and improves thofe received below. The part 2, draws the principal 
nourilhment; the fhaggy furface is compofed of Fibres of a peculiar kind. 
The part 3, is as yet only in the condition of one great Fibre. It will 
be proper to examine firft the furface in thefe three parts, and afterwards 
the internal fubftance. 
To this firft purpofe a thin piece of the furface lliould be taken oft 
the whole length of the Root, with a very delicate Knife : and a piece of 
each part laid before the Microfcope. The piece of part i, marked 
Fig. 5, is a plain fmooth piece of rind, with nothing rifing from off its 
furface. Veflels appear within it, but of thofe we fliall treat hereafter dif- 
tindly. 
In the piece of part 2, figured here at 6, we fee the fhaggy furface 
is compofed of little Fibres. Thefe are fiiort, pellucid, and verv fimple 
in their firudture. We fee in this piece the courfe of the VTlTels, as ia 
the former ; and thefe Fibres take their origin always from thefe, and ne- 
ver from the interfiicial fubftance. 
To examine one of thefe fmall fibres exaflly, it will be proper to cut 
oft a very fmall fegment of the piece 6, and laying it in water before the 
double Microfcope, with a powerful magnifier, we fee it as exprefTed at 
8 ; differing in nothing from the part 3 of the large Fibre, except that 
it is more pellucid; it is a plain, fimple, uninterrupted tube, terminated 
by a fmall button at the extremity, jull: as the longer Fibre. Thefe twill 
themfelves varioufly about, and the clubbed ends refembling the heads of 
Animals, they appear fo many little ferpents, or dracunculi, darting their 
fmall heads about with fury. 
The part remaining to be examined of the furface of the Root, is the 
third divifion or extremity. This being the fame with the Fibres juft, 
named, only larger, will ferve happily to difclofe alfo their ftrudture. 
Fig 7. It appears fimple ; but when larger magnifiers are ufed, we find 
it, like the other parts, vafcular : only all is more delicate. The great 
objed; of attention is the terminating Head or Button, 
C H A Fl. 
