The Edinburgh Encyclopaedia, Conducted by D. Brewster

The Edinburgh Encyclopaedia, Conducted by D. Brewster

By (author) 

List price: US$88.00

Currently unavailable

Add to wishlist

AbeBooks may have this title (opens in new window).

Try AbeBooks

Description

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. 1830 edition. Excerpt: ... hole; and though these are applied at many collieries, yet the short pudding link chain? are those most generally used. They are proved as to strength, and warranted; have given great satisfaction, and are an immense saving to collieries. These chains are now in general use, and-for other purposes besides mining concerns. We have, however, to remark, that the colliers have hitherto declined riding by them in the pits, for this reason, that the fault in a rope is easily seen, but a great fault may exist in a link which cannot be observed. Upon the corves being landed or banked at the pittop, they are either drawn to the bin or pit-heap by horses upon slipes, or by trammers on a tram road, which is now the common practice. When the coals are small, as at Newcastle, the pit head is raised eight or nine feet higher than the common level of the ground, and the heap proceeds from this height outwards from the pit mouth; and if the bins increase, the tram roads are laid upon the bin or heap as it advances outward. When coals are wrought large, termed great coal, the pit mouth has only a gentle rise from the common level of the coal-hill adjoining, and the coals are built up in walls, piece by piece, the small coal is either thrown into the heart of the walls or bins, or laid apart by themselves, as may best suit the sale of the coals. Having thus attempted to describe the various plans which have been adopted for working coal-mines, a most important point in mining remains to be treated of, which is ventilation, or the means which have been adopted for supplying the workmen with atmospheric air, sufficiently pure for the support of animal life, and the'flame of the candle or lamp which gives light in the mines. The coal-mines of Great Britain were, as...show more

Product details

  • Paperback | 842 pages
  • 189 x 246 x 42mm | 1,474g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236583272
  • 9781236583277