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 The Ues of the Stone itelf may alo be immene. We are well informed that the Steatites, and a Foil of the Nature of the Bolonian Stone, are great Ingredients in Porcelane. This Subtance eems to promie all that can be wihed, without any farther Mixture. For the Matter in the Neck of the Retort, when hardened, differs little from the Subtance of China Ware.

In Mineralogy there are laid open to us alo a thouand Articles of Wonder; which naturally perplexed us before we were acquainted with this Stone: Becaue, not knowing this, which was the true Source of them, it was impoible that we hould gues how they were performed.

, in a very excellent Letter to Mon. , on the Subject of a red Ore of Lead found in Siberia, entertains a Conjecture, not only that this in particular, but many others, owe a great deal of their Qualities and Particularities to the Marine Acid. The Conjecture was good; but 'tis eay now to ee, by numerous Intances, that the Acid, upected by many, and abolutely dicovered by this able Chymit, as performing many and great Things in the mineral World, is not the muriatic, but this tony Acid; preent in a thouand Places where we do not upect it; and performing a Multitude of Things which mut have been unintelligible, and therefore wonderful to us, o long as we were not acquainted with it; or indeed knew of its Exitence.