The Gallery of Nature; A Pictorial and Descriptive Tour Through Creation, Illustrative of the Wonders of Astronomy, Physical Geography, and Geology

The Gallery of Nature; A Pictorial and Descriptive Tour Through Creation, Illustrative of the Wonders of Astronomy, Physical Geography, and Geology

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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. 1852 edition. Excerpt: ... long against the increasing pressure of the waters, and the sudden efflux of such a mighty volume as was collected, would as certainly desolate the Val de Bagnes. To avoid this calamity, which every day became more impending, an engineer started the bold scheme of tunnelling the rampart of ice, and was employed by the government of the canton for that purpose. This scheme, says the memoir of M. Escher upon it, "was begun on the 10th of May, and finished on the 13th of June, under the direction ot M. Venetz. The gallery was sixty-eight feet long, and during its formation the workmen were exposed to the constant risk of being crushed to pieces by the falling blocks of ice, or buried under the glacier itself." The lake at this time contained at least 800 millions of cubic feet of water, which in three days was reduced to 530 millions, by the discharge from the gallery. The sequel may best be related in the words of the memoir: --"As soon as the water flowed from the lower end of the gallery the velocity of the cascade melted the ice, and thus wore away the gallery at its month. The water which had penetrated the crevices of the glacier caused enormous fragments of ice to fall from the lower sides of it; so that owing to these causes the body of the glacier, which formed the retaining wall of the lake, was so much diminished in thickness that the floor of the gallery was reduced from its original length of 600 to 8 feet. As soon as the cascade had cut through the cone of ice, it attacked the debris of the base of Mauvoisin, upon which the cone rested; that is to say, the torrent undermined the glacier by washing away the loose materials forming the bed of the stream, on which the mass of ice had been piled up; and having carried it off...show more

Product details

  • Paperback | 478 pages
  • 189 x 246 x 24mm | 844g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236625595
  • 9781236625595