save that it seem’d a little to Dilute it.  Only in some early Prim-roses it destroy’d the greatest part of the Colour, and made the Paper almost White agen.  And Madder also afforded some thing peculiar, and very differing from what we have newly mention’d:  For having gather’d Some Roots of it, and, (whilst they were recent) express’d upon White Paper the Yellow Juice, an Alcalizate Solution drop’d upon it did not turn it either Green or White, but Red.  And the bruis’d Madder it self being drench’d with the like Alcalizate Solution, exchang’d also its Yellowishness for a Redness.

An admonition touching the four preceding Experiments.

Having thus (Pyrophilus) given you divers Instances, to countenance the General observation deliver’d in the twenty fifth Experiment, and divers Exceptions whereby it ought to be Limited; I must leave the further Inquiry into these Matters to your own Industry.  For not remembring at present many of those other Trials, long since made to satisfie my self about Particulars, and not having now the Opportunity to repeat them, I must content my Self to have given you the Hint, and the ways of prosecuting the search your Self; and only declare to you in general, that, As I have made many Trials, unmention’d in this Treatise, whose Events were agreeable to those mention’d in the twenty fifth Experiment, so (to name now no other Instances) what I have try’d with Acid and Sulphureous Salts upon the Pulp of Juniper Berries, rubb’d upon White Paper, inclines me to think, That among that vast Multitude, and strange Variety of Plants that adorn the face of the Earth, perhaps many other Vegetables may be found, on which such Menstruums may not have such Operations, as upon the Juice of Violets, Pease-blossoms, &c. no nor upon any of those three other sorts of Vegetables, that I have taken notice of in the three fore-going Experiments.  It sufficiently appearing ev’n by these, that the effects of a Salt upon the Juices of particular Vegetables do very much depend upon 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