Travels in Siberia, Including Excursions Northwards, Down the Obi, to the Polar Circle, and Southwards, to the Chinese Frontier Volume 1

Travels in Siberia, Including Excursions Northwards, Down the Obi, to the Polar Circle, and Southwards, to the Chinese Frontier 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. 1848 edition. Excerpt: ... the southward; but the principal constituent of the crags at the summit is hornblend. On the Blagodat, the feldspath and magnetic ore overlays the pure iron ore; whereas it is the hornblend that takes the upper situation on the Kachkanar, as well as in the southern offshoots of the seams at Kushva. The blue mountain (Sinaya Gora), fourteen versts S. S.E. of the Blagodat, has a mine driven into the hornblend, of which it is almost wholly composed, and which yields a fifth of its weight of iron. It was to the southward of Sinaya Gora that copper ores were discovered, in the greenstone bounding the ferruginous rocks on the west, and which led to the opening of the rich mines at Tagilsk. M. Terletskii makes the height of the Blagodat 224, that of the Kachkanar 740, French feet more than our measurement. Not having his data before me, I am unable to make any attempt to reconcile this discrepancy. Our entertainer at Kushva was M. Volkov, to whom the world is indebted for the first specimens of platinum procured on the ancient continent. The rich magnetic iron ores found at Kushva, have the property of losing much of their original compact texture when exposed to the air; so that they are not only much more easily broken up for smelting, but it is even maintained by many of the miners that this effect might be so far promoted by artificial means that roasting might be dispensed with. The oxydised ores already noticed are considered as an indispensable addition to the magnetic ores for the cannon foundry, where the requisite admixture of alloy must be strictly attended to, even in the casting of balls and shells. Experiments were making at the time of our visit, as to the best composition of metals for the axles of wheel-work: the result of many...show more

Product details

  • Paperback | 150 pages
  • 189 x 246 x 8mm | 281g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236674782
  • 9781236674784