Opening On Stones — Theophrastus in Plato Scroll…
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Theophrastus · Anonymous (1774)
OF Things formed in the Ground, some have their Origin from Water, others from Earth. Water is the Basis of Metals; as Silver, Gold, and the rest: Earth of Stones; as well the more precious, as the common: and of the various Earths of peculiar Kinds, whether remarkable for Colour, Smoothness, Density, or whatever other Quality. The Metals have been considered in another Work: the Stones and Earths of various Kinds, therefore, are to be the Subject of this Treatise. All these we are (plainly speaking ) to judge formed by the Concretion of Matter pure and equal in its constituent Parts; which has been brought together in that State by mere Afflux; or by means of some Kind of Percolation; or separated, as before observed, from the impurer Matter it was once among, in some other Manner: For perhaps it is effected in some Cases by one; and in others by other of these Means. From the …
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