Illustrations of the viscous theory of glacier motion

 
9781236236357: Illustrations of the viscous theory of glacier motion
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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. 1846 Excerpt: ...of a front view of the Schonhorn taken from the opposite heights, and a ground plan of the glacier. The latter is sketched merely by the eye, but the scale is furnished by some actual measures. I first visited the glacier on the 20th of July 1844. It was then covered over, by far the greater part of its extent, with snow, as shown in the plan. This snow is in great part manifestly permanent, and the glacier is therefore in the state of niv4. The general slope is from top to bottom of the plan, and its inclination is variable, depending upon the direction of the avalanches by which it is fed, of which the principal descends the rapid couloir marked C, when the inclination is about 35. This avalanche forms a sort of ridge down the glacier, as indicated by the shading of the map, leaving a considerable space comparatively flat to the eastward. On the west, the snow thins off from the ridge until it exposes the ice near the part marked B, where the slope is still considerable, being 20, and here we have the real mass of the glacier exposed, although the ice is not of an exceedingly hard or crystalline character. The front or lower termination of the glacier all along presents a steep, nearly precipitous surface of ice, sloping from 45 to 60. This ice rests on a bed of debris of rock which appears to be inclined about 25. Except near the precipitous termination of the glacier, there are no apparent crevasses. The surface is uniform and uninterrupted. Some water issues from beneath the steepest part of the ice; but even in the middle of the day, near the end of July, there was exceedingly little. The length, if it may be so termed, of the glacier, from back to front is about 1000 feet, and its greatest breadth 1300 feet. Its surface may be roughly estimated at tw...

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This book brings together works published between 1846 and 1859 by James D. Forbes (1809-68) and John Tyndall (1820-93), both experienced alpinists as well as glaciologists. Their views on the motion of glaciers were disparate, and a scientific quarrel over primacy of discoveries continued even after their deaths.

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Other Popular Editions of the Same Title

9781108075282: Illustrations of the Viscous Theory of Glacier Motion: And Three Papers on Glaciers by John Tyndall (Cambridge Library Collection - Earth Science)

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ISBN 10:  1108075282 ISBN 13:  9781108075282
Publisher: Cambridge University Press, 2015
Softcover

9781179287942: Illustrations Of The Viscous Theory Of Glacier Motion

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