Congressional Edition Volume N . 2991

Congressional Edition Volume N . 2991

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1892 edition. Excerpt: able to keep up with the nower districts, where unusual mining difficulties are not likely to be met with for some years to come. So far as regards the evolution of force, the enormous comparative waste of the products of combustion which accompanies even the most advanced methods of utilizing fuel known at the present day would seem to afford a margin to the efforts of scientific investigation which it can scarcely fail, in course of time, to enter upon and make available. If the small proportionate quantity of the total heat energy resident in coal, which it is now considered possible to control (say 20 or 25 per cent), could be multiplied even by 2 or 3 there would still remain a surplus for waste, but the same work would consume only one-half or one-third of the coal, which would, of course, be tantamount to multiplying as many times the available reserves now known to exist. If, coincidently, a corresponding increase could be accomplished in the economy of application, whereby a given force should be made to do effective work beyond the present limit, in such event the question of supply would come to wear a much less ominous front than is lent to it by figures like those which have been cited. These proportions are, of course, truisms, but. incidentally to the subject, it may be added that the incidence of this more or less remotely threatened scarcity appears already to be making itself manifest by turning men's thoughts towards auxiliary sources. For example, it has been recently announced that water gas, for whose use great advantages are claimed, can now be manufactured in the Leeds district at a cost of somewhat less than id. sterling (or about 8 cents Federal currency) per 1,000 feet. Annexed is a statement derived from more

Product details

  • Paperback
  • 189 x 246 x 12mm | 404g
  • United States
  • English
  • black & white illustrations
  • 1236749618
  • 9781236749611