A Second Visit to the United States of North America volume 01
A Second Visit to the United States of North America volume 01
Charles Lyell
The book A Second Visit to the United States of North America volume 01 was written by author Charles Lyell Here you can read free online of A Second Visit to the United States of North America volume 01 book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is A Second Visit to the United States of North America volume 01 a good or bad book?
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This more modern coal, as well as that of New castle, and other kinds of more ancient date, exhibits under the microscope distinct evidence of vegetable structure, consisting in this case principally of parallel fibers or tubes, whose walls are pierced with circular or elongated holes. See fig. 5. B. And F. By analysis it is found that so far as relates to the proportions of carbon and hydrogen, the composition of this coal is identical with that of ordinary specimens of the most ancient coal o...f America and Europe, although the latter has been derived from an assemblage of plants of very distinct species. The bituminous coal, for example, of the Ohio coal-field, and that of Alabama, yields the same elements. For many years the cities of New York and Philadelphia hava been supplied with gas for lighting their streets and houses, from CHAP. XV. ] EXPLOSION OF GAS. 215 Vegetable Structure of Mineral Charcoal from Clover-hill Mines, Virginia. coal of the Blackheath mines, and the annual quantity taken by Philadelphia alone, has of late years amounted to 10, 000 tons.
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