Materials of Engineering Volume 1

Materials of Engineering Volume 1

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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. 1907 edition. Excerpt: ...necessary to keep this fact carefully in mind. Twenty-four samples of anthracite from Pennsylvania, analyzed by Britton, gave as a mean Carbon 91.05 Volatile matter 3-45 Moisture 1-34 Ash 4-16 100.00 There was included in the above, sulphur, 0.240, phosphorus, 0.013. A variety of this class of coals, similar in composition, but differing from the typical anthracite above described in structure, has been sometimes called semi-anthracite. It does not exhibit the conchoidal fracture of the latter, but is somewhat lamellar, and is marked by fine joints or planes of cleavage. It crumbles readily, and has less density than the preceding. One method of distinguishing good examples of the two varieties is found in the fact that the latter, when just fractured, soils the hand, while the former does not. The latter variety kindles quite readily and burns freely. An example of this coal contained, in one hundred parts, carbon, 90; hydrogen and oxygen, 1.5; ash, 8.5. 173. The Bituminous Coals are sometimes divided into three classes. Dry Bituminous Coal contains about 75 per cent. of carbon, 5 per cent. hydrogen, and 4 per cent. oxygen. That part of the hydrogen which is combined with carbon is capable of adding to the heat-giving power of the coal. This coal is lighter than anthracite, its specific gravity being about 1.3. Its color is black or nearly black, and its lustre resinous; it is moderately hard, and burns freely. Its structure is weak, brittle and splintery, fine-grained, and of uneven surface. It kindles with less difficulty than any variety of anthracite, but less readily than the bituminous coal to be described. It burns with a moderate flame, and gives off little or no smoke. Bituminous Caking Coal contains sometimes as little as 60 per cent....
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Product details

  • Paperback | 104 pages
  • 189 x 246 x 6mm | 200g
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236609867
  • 9781236609861