The Metallic Wealth of the United States; Described and Compared with That of Other Countries

The Metallic Wealth of the United States; Described and Compared with That of Other Countries

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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. 1854 edition. Excerpt: ...and everywhere filled with copper. From it sheets and lumps of pure copper have been taken, from a few ounces up to twenty or thirty pounds in weight. Near the Copper Falls Mine there are extensive ancient workings on this metalliferous belt In the Hill Mine, where it is thinner than in the Copper Falls Mine, it contains an intercalated bed of sandstone 18 inches thick, which carries enough copper to be excellent stamp-work. Mr. Hill remarks of this cupriferous belt as follows: " By some it is believed that it contains 1 per cent, of copper, but by others it is thought to be much richer. It is perfectly clear, from what can now be seen of it, that many thousand tons of mixed rock and copper will be taken from it in opening the mines. It will require no calcining to stamp and wash easily, and can be cheaply excavated. So little has been done in testing the value of the bed in question, that great caution should be observed in giving an opinion in regard to it; but metalliferous beds have been, and are now, mined in the Ontonagon district with some success, and on Portage Lake with prospects decidedly flattering." From Mr. Hill's Report, dated March 1st, 1854, we learn that up to that date, in both mines, 543 fathoms of vein had been stoped, which yielded 469,863 lbs. of 70 per cent, stuff, equal to 865 lbs. of pure copper per fathom. Some parts of the ground stoped in the Hill Mine have yielded more than one ton per fathom. The amount of stoping ground, open in both mines, at the same time, was over 4,000 fathoms of productive ground, besides 7,000 not considered worth removing. During the past year, a steam-engine and stamps have been erected, and are now nearly ready to go into operation, all the copper thus far shipped from this mine...show more

Product details

  • Paperback | 170 pages
  • 189 x 246 x 9mm | 313g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 123664722X
  • 9781236647221