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. 1823 Excerpt: ... is met with in all the various states of transformation. Whole trees are converted into pit-coal, in such quantities together as to exhibit entire forests; in which the roots, trunks, branches, bark, and even species, are discernible. The operations of miners are often interrupted hy explosions of gas called fire damp ...
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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. 1823 Excerpt: ... is met with in all the various states of transformation. Whole trees are converted into pit-coal, in such quantities together as to exhibit entire forests; in which the roots, trunks, branches, bark, and even species, are discernible. The operations of miners are often interrupted hy explosions of gas called fire damp, which is evolved in great ahundance in coal pits; and the most terrific and fatal explosions take place. It is the carhuretted hydrogen gas of chemists, and 100 parts is composed of 72 of car hon and 28 of hydrogen; or of seven atoms of hydrogen, and three of carhon. Fire-damp is formed hy the action of coal upon water. The water is decomposed, two atoms at once; all the oxygen comhines with carhon, and forms carhonic acid; while all the hydrogen unites likewise with carhon, and forms carhuretted hydrogen, or fire-damp. The coal appears to part with a portion of its carhuretted hydrogen, when newly exposed to the atmosphere; hecause it is more inflammahle when fresh from the pit than after long exposure to the air. Another source of the gas may he from the water, which is constantly decomposing, hy the action of the pyriious shales, which process is going on in all the old workings, and must he productive of great quantities of hydrogen. The ahundance of it is surprising, and it frequently takes lire in a shaft, long hefore the coal itself is reached hy the sinkers; and when the pitmen occasionally open, with their picks, crevices in the coal or shale, as much as 700 hogsheads of fire-damp have escaped in a minute. These hlowers, as they are termed, continue in a state of activity for many months together, and seem to derive their energy from communicating with immense suhterraneous reservoirs of air. The after-damp or stythe, which follows ...
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PLEASE NOTE, WE DO NOT SHIP TO DENMARK. New Book. Shipped from UK in 4 to 14 days. Established seller since 2000. Please note we cannot offer an expedited shipping service from the UK.
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Seller's Description:
PLEASE NOTE, WE DO NOT SHIP TO DENMARK. New Book. Shipped from UK in 4 to 14 days. Established seller since 2000. Please note we cannot offer an expedited shipping service from the UK.
