An essay on chemical statics Volume 2; with copious explanatory notes, and an appendix on vegetable and animal substances - Softcover

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ISBN 10: 1459033086 ISBN 13: 9781459033085

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated.1804 Excerpt: ... SECTION V. Of Metallic Substances. 361. The metals have properties which distinguish them from other substances, and which are so marked that no doubt can be raised as to those which should be placed in the class of metallic substances, except we have not yet succeeded in reducing them to the state of metal, and are consequently obliged to determine by the sole consideration of their compounds. Their distinctive properties are principally derived from the reciprocal affinity by which they can combine with each other, while they unite with only a small number of other substances, from their specific gravity, which is much greater (that of tin, the lightest of metals, being 7.3, water being taken as unity, and the specific gravity of sulphate of barites is only 4.5); but principally from the affinity which they have for oxigen, and from the result of their oxidation, which also acquires properties distinct from those of other combinations. The differences of these properties serve to compare them with each other; thus the specific gravity of platina is more than 20, while that of tin is only 7.3: some can alloy in all quantities, and others can only unite in certain proportions: some have so strong an affinity with oxigen that it can hardly he separated from them; others, on the contrary, have a very weak one: the oxides of all of them comport themselves in very different manners with the acids, and with the alkalis. Among these properties, that which has most influence on their apparent qualities and on those made use of in the arts, is the force of cohesion, whose effects, combining with those of the figure of their moleculse, occasion a difference in their pliability, their elasticity, their ductility, and their malleability, which seems to arise from "the...

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• ISBN 10: 1459033086
• ISBN 13: 9781459033085
• Einband: Tapa blanda