Mining And Metallurgy With a Set of Mining Maps
Mining And Metallurgy With a Set of Mining Maps
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Years.
Yield of coal.
Pouds.
Pouds.
1860 1865 1870 1875 1880 1881 1882 1883 631, 250 1, 371, 300 5, 078, 500 2.^, 658, 600 25, 117, 81)0 23, 426, 200 24, 400, 300 22, 731, 500 1884 1885 1866 1887 1888 1889 1890 1 24, 009, 500 21, 307, 500 15, 652, 300 17, 589, 100 16, 865 000 18, 697, 300 14, 268, 100 66 MINING INDUSTEIES OF RUSSIA.
The decrease in the production of coal from the Moscow basin during recent years is due to the competition of the Donets coal, which is of far better quality, and a...lso to the increased adoption of naphtha refuse in the place of Moscow coal and peat in the Moscow manufacturing district.
At the present time the presence of coal has heen certified in over two hundred places in the Moscow basin, but only twelve mines are worked. This is due to the fact that only a few veins are of a workable character, and also to the fact that the coal is often of very poor quality and does not permit of being transported to any distance, or of being exposed to the atmosphere for any length of time; it often contains also a considerable amount of ash.
What to read after Mining And Metallurgy With a Set of Mining Maps?
You can find similar books in the "Read Also" column, or choose other free books by A P Aleksiei Petrovich Keppen to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Years.
Yield of coal.
Pouds.
Pouds.
1860 1865 1870 1875 1880 1881 1882 1883 631, 250 1, 371, 300 5, 078, 500 2.^, 658, 600 25, 117, 81)0 23, 426, 200 24, 400, 300 22, 731, 500 1884 1885 1866 1887 1888 1889 1890 1 24, 009, 500 21, 307, 500 15, 652, 300 17, 589, 100 16, 865 000 18, 697, 300 14, 268, 100 66 MINING INDUSTEIES OF RUSSIA.
The decrease in the production of coal from the Moscow basin during recent years is due to the competition of the Donets coal, which is of far better quality, and a...lso to the increased adoption of naphtha refuse in the place of Moscow coal and peat in the Moscow manufacturing district.
At the present time the presence of coal has heen certified in over two hundred places in the Moscow basin, but only twelve mines are worked. This is due to the fact that only a few veins are of a workable character, and also to the fact that the coal is often of very poor quality and does not permit of being transported to any distance, or of being exposed to the atmosphere for any length of time; it often contains also a considerable amount of ash.
What to read after Mining And Metallurgy With a Set of Mining Maps?
You can find similar books in the "Read Also" column, or choose other free books by A P Aleksiei Petrovich Keppen to read onlineMoreLess
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