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 to imbibe its Acid, as to have no Power of diolving this Metal at all. Nor is this latent Acid peculiar to the expreed Oils alone; thoe procured by Ditillation evidently contain it alo, as the excellent Dr. Hoffman has proved, who by grinding the ditilled Oils of Lavender and Turpentine with Salt of Tartar, obtained thence a neutral Salt.

Wax, in like Manner, diolves Copper no otherwie than by a true, genuine, and pretty harp Acid, which it evidently contains, and which is eaily eparated from it by Ditillation with a very gentle Heat. And in regard to Water, it may not be improper to oberve, that though it is but a poor Diolvent of Metals with us, yet it may in the Bowels of the Earth, do Wonders: For we find evidently, that the Power of Water, as a Mentruum, depends, in many Caes, exactly on its Degree of Heat; and as it is capable of the greater Heat, the greater Weight of the Atmophere it is preed by, we know not to what Height its Heat and diolving Power may be raied at great Depths in the Earth.

Of the mineral acid Mentruums, Spirit of Sea-alt, Spirit of Nitre, and Agua regia, all afford green Solutions of Copper, but with this Difference, that the Spirit of Salt gives a yellowih Green; the Spirit of Nitre a deep Green, with no Yellownes at all; and the Agua regia, a bright vivid Green, but there is ome Admixture of Yellow in it, about in the ame Meaure that it is in ome of the Gems which Pliny