VEGETABLE STRUCTURE: 
1 90 
Flefh of the Plant j but it is difficult to feparate it, without heat and long 
maceration. 
If Ibme Truffles be cut into flices, and dewed in river water, there 
rifes to the Airface a peculiar matter, which, as it cools, forms a tough 
S'iin like V'ellum. This was originaily a Juice l(xls:ed betwten the outer 
ai'iil I'econd Rind, and it held them fafe together. When the boiled Truf- 
fle is diverted of this, let it be macerated eighteen or twenty days in 
water, and the parts will feparate. We then take off a brown oiner icind, 
wl'iich is rough, unequal in its texture, and very thin. Tliis dees not 
form, but merely covers the Tubercles on the furf.ice. q, 4. 
U.\DE,R tins we find a yellowifli Coat, confiderahly thicker, 7, 8 ; but 
ncitlter does thi. form the 'rubc-cles : it, like the other, only covers them. 
The Ridges are plain in this, 9, 10 ; and the true form of the Tubercle is 
better feeu here than in the other : at the Head is a little opening ; and 
there is the fame in the outer Kind, on the Head of each Tubercle, only 
its naturally uneven farface nnda's it more ditlicult to be dillinguilhed. 
Between the brown and ycilovv Rind lies the tough, gluey matter 
which formed the Skin fepa.ated in boiling, and which, till feparateJ, held 
them fo fait together. 
The body of the Truffle being thus cleared from its two Rinds, is 
of the fame form that it was while they were upon it ; it now appears a 
mafs of whitirti Jelly, rifing into fo many angulated Tubercle , 1 1 : and, 
when cut afunder, there is the appearance of another Coat ; but this is a 
deception. There (eems a Coat cf a veiy confiderab'e fubrtance rifing 
into thele Tubercles, and of lome imall thicknefs, even in the fpaces be- 
tween them, covering a brown flelhy matter. 1 2. 
This is no more than an appearance. The whole white fubrtance is the 
pure Pulp or Flefli of the Truffle ; and it is this which abfolutely forms 
the Tubercles. In thefe, and for fome I'mall thicknefs between them, and 
below them, it runs in the fame pure form ; and is diftinguilhed by its 
white colour: all within this is brown. This difference of colour, great 
as it appears, is owing to innumerable Seeds. The colour of thefe is a 
dufky brown ; and they lie fo dole, that they give the fame hue to the 
whole inner part, when the naked eye only fees it. 
In a thin piece laid before the Microfeope, Fig. 13, we fee the fuperfi- 
cial part is white, becaufe it is pure, unmixed with Seeds, and of a clofer 
texture ; and within it is of the fame matter, white as that, but more 
fpungy, and intermingled with thefe innumerable Seeds. It is the fame 
difference that we fee between the folid Pulp at the bottom of the Puff- 
ball 
