their particular Textures.

_EXPERIMENT XXIX._

It may be of some Use towards the discovery of the nature of these Changes,
which the Alimental Juice receives in some Vegetables, according to the
differing degrees of their Maturity, and according to the differing kinds
of Plants of the same Denomination, to observe what Operation Acid,
Urinous, and Alcalizate Salts will have upon the Juices of the several
sorts of the Vegetable substances I have been mentioning.

To declare my meaning by an Example, I took from the same Cluster, one
Blackberry full Ripe, and another that had not yet gone beyond a Redness,
and rubbing apiece of white Paper, with the former, I observ'd, that the
Juice adhering to it was of adark Reddish Colour, full of little Black
Specks; and that this Juice by a drop of a strong _Lixivium_, was
immediately turn'd into a Greenish Colour deep enough, by as much Urinous
Spirit into a Colour much of Kin to the former, though somewhat differing,
and fainter; and by a drop of Spirit of Salt into a fine and lightsome Red:
where as the Red Berry being in like manner rubb'd upon Paper, left on it a
Red Colour, which was very little alter'd by the Acid Spirit newly nam'd,
and by the Urinous and Lixiviate Salts receiv'd changes of Colour differing
from those that had been just before produc'd in the dark Juice of the Ripe
Blackberry.

I remember also, that though the Infusion of Damask-Roses would as well,
though not so much, as that of Red, be heightned by Acid Spirits to an
intense degree of Redness, and by Lixiviate Salts be brought to a Darkish
Green; yet having for Trials sake taken a Rose, whose Leaves, which were
large and numerous, like those of a Province Rose, were perfectly Yellow,