Economic Geology; Or, Geology In Its Relations To The Arts And Manufactures

Paperback | May 14, 2012

byDavid Page

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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. 1874 Excerpt: ...these products being merely vegetable masses in different stages of mineralisation and metamorphism. The available coals of Britain are chiefly of carboniferous age; but many excellent coal-fields in America, in India, the Indian Archipelago, and other countries, belong to the oolitic and chalk periods; while graphites and anthracites may belong to any period according to the metamorphism or debituminisation to which they have been subjected. Indeed, as our geological surveys are extended, it will yet be found that coals are products of all periods--differing, it is true, in the nature of the successive vegetable developments which contributed to their formation, and in the degrees of mineralisation they may have undergone, but essentially composed of the same inflammable elements. Like other rocks, common bituminous coal presents many varieties; and these, according to their structure, texture, and qualities, have received various names,--as caking coal, which is soft and "tender" in the mass, like that of Newcastle, and swells and cakes together in burning; splint ox slate coal, which is hard and slaty in texture, and burns free and open; cannel or parrot, which is compact and jet-like in texture, burns open with a clear candle-like flame, and, from its composition, is largely used in the manufacture of gas; and coarse, foliated, or cubic coal, which is more or less soft, breaks up in large masses, and contains, in general, a considerable percentage of earthy impurities. Besides these there is, of course, every gradation,--coals so pure as to leave only two or three per cent of ash; others so mixed as to yield from ten to thirty per cent; and many so impure as to be unfit for fuel, and so to pass into the category of bituminous shales. As the bi...

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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. 1874 Excerpt: ...these products being merely vegetable masses in different stages of mineralisation and metamorphism. The available coals of Brit...

Format:PaperbackDimensions:134 pages, 9.69 × 7.44 × 0.29 inPublished:May 14, 2012Publisher:General Books LLCLanguage:English

The following ISBNs are associated with this title:

ISBN - 10:0217833896

ISBN - 13:9780217833899

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