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It will deposit the several minerals in the order of their solubilities that is, the last to be taken in will be the first to be crystallized on the walls of the fissure through which the upflow is taking place. The result will be the formation of a vein belonging to the variety known as fissure veins. A vein deposit such as we are considering may, though rarely, be composed of a single mineral.
In the last lecture, under the head of "Solution," I mentioned that some salts, some chemical substances, are more soluble in water than others, and that their solubilities under different circumstances of temperature vary in different ways. However, some salts and compounds are practically insoluble in water under any circumstances.
What shall we think, then, of the vandals who during the past year twice cut out the article on political economy in "Appletons' Cyclopædia," so mutilated Thomson's "Cyclopædia of the Useful Arts" as to render it valueless, and bore off bodily Storer's "Dictionary of the Solubilities," the second volume of the new edition of the "Encyclopædia Britannica," Andrews's "Latin Dictionary," and several other valuable works?
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