Page:Theophrastus - History of Stones - Hill (1774).djvu/285

 great Uniformity in many Intances, that they mut be derived the one from the other: But it hould eem mot agreeable to Nature, to refer both; as alo the new-dicovered Acid of Stone; to one and the ame general Principle; of which they all three partake, altho' each has its own ditinctive Qualities from the others; and to determine that they all originate from, or are merely different Modifications of, the ame original Principle, the univeral Acid.

This we may at all Times meet with in the three eparate and ditinct Forms already mentioned, vitriolic, muriatic, and tony; tho' no Man ever aw it eparate and in its own. We ee it,

From all thee Subtances we can obtain it by Means of Ditillation; united with more or les Water. And this is the only Condition in which we have, or can have any Acquaintance with it. From whichoever of thee Subtances we thus produce it, there are certain general Properties in which it agrees: As alo certain Powers or Qualities by which it differs; according to the one or other of thee Bodies from which it is drawn.

From whichever of thee Subtances it is produced,