Scientific American Volume 115

Scientific American Volume 115

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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. 1916-07 edition. Excerpt: ...of some 500,000 square miles, or an archipelago similar to the one lying north of western Canada. Upon the hypothesis of a deep and uninterrupted polar basin it is diiiicult to account for the fact that the range of the semi-daily tide along the north coast of Alaska is only about a quarter as great as that at Bennett Island, 'near the New Siberian group. Dr. R. A. Harris, of the U. S. Coast and Geodetic Survey, who for years has studied the problems connected with the tides of the Arctic, has, even sketched an hypothetical continent within the unknown area. He has also shown that the diurnal tides along the north coast of Alaska have less than one half the rise and fall which the tidal forces acting over an uninterrupted basin would produce, and that the daily ebb and flow actually occurs earlier at Point Barrow than at Flaxman Island, 275 miles to the eastward, whereas with an open polar sea the reverse would be the case. On the other hand, Dr. Nansen, the Norwegian explorer, basing his belief upon soundings obtained during the drift of the " Fram," insists that the area in question is a deep open basin. This ship, however, in its remarkable drift, barely skirted the region under discussion. At any rate, the aeroplane stands preeminent as a means for testing the validity of these theories, for it is absolutely impossible for ships or dog teams to penetrate far into the interior of the Arctic ice pack. In 1879 the " Jeanette," under Lieut. De Long, in an attempt to reach the Pole by way of Bering Strait was forced into the ice pack near Herald Island and (Concluded on page 308)_ T the opening of the European war, battle pracAtlce with our 12-inch guns was carried on at ranges of about 10,000 yards; and it was...show more

Product details

  • Paperback | 700 pages
  • 189 x 246 x 36mm | 1,229g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236800117
  • 9781236800114