Inhaltsangabe
This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1757 edition. Excerpt: ... CHAP. VI. Of the Iron in the PyRites. IN the foregoing chapter having treated not so much of the material origination, as rather, if not principally, of the time of the production, and consequently of the creation and generation of the pyrites, I should now immediately proceed to its material principles: but this, at present, is neither advifeable nor possible, tho' a method of writing that most are fond of: seeing we must first consider pyrites, as analyled into its proximate parts, and thus mediately proceed to its principles: and we can as little pretend to begin our research as description there, where nature has begun her work; there being difficulty enough to discover such principles, as I will not fay, ought to be made objects of our fenses, a thing neither possible nor reasonable to acquire, but by probable conclusions only, fairly flowing from observations. There is the fame difference between the constituent parts and the original principles of a natural body, as between proximate and remote; pyrit are derived from water and earth, as their principles, or remote parts; but consist of the following mixts; viz. the fat earth, or sulphur; the mtreurial earth, or arsenic; the metallic earth, or iron, as their pioximate parts. Some instances 'there are, in which analysis stands verified by Synthesis; others, in which it does not. Cinnabar not only consists of quicksilver, as its separation plainly shews, but may again be iormed from H sulphur. sulphur and quicksilver, and that most easily and constantly; and there may speedily, though not constantly, be prepared a formal antimony from regulus and sulphur: But in compounding sulphur and iron, the parts into which a pure ironpyrites is evidently resoluble, it does not succeed. The...
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