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. 1907 Excerpt: ...lead pipe), which is accomplished by the co-operation of heat and pressure. Nor is ice an absolutely rigid body; on the contrary, it becomes plastic at comparatively small pressures and can be caused to change its shape without the preliminary process of thawing. Some years ago the author showed that by a!pressure of ...
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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. 1907 Excerpt: ...lead pipe), which is accomplished by the co-operation of heat and pressure. Nor is ice an absolutely rigid body; on the contrary, it becomes plastic at comparatively small pressures and can be caused to change its shape without the preliminary process of thawing. Some years ago the author showed that by a!pressure of 20 atmospheres pure ice at--20 C. could be run into solid rods, through quite small openings. This means that a mass of ice at a depth of 200 m. (656 ft.) would be as plastic as clay, and could no longer retain its form or place without support. Naturally the conditions of plasticity would require much greater pressure (or depth below the surface) if the frozen material were not pure ice, but a mixture of water and clay or sand, in which the internal friction between the constituent particles would be greater and the pressure necessary to produce flow much higher. The same would be true when small areas or masses of pure ice fill cavities or fissures in hard ground. It is a well-known fact that the freezing-point of water is lowered by dissolving soluble salts therein. The freezing-point drops more or less according to the kind and amount of material dissolved, and the ice formed is less compact and softer than pure ice. Evidently, when under pressure the plasticity of such ice is much greater than when pure. It is also well known that, as the temperature falls, the hardness of all bodies increases rapidly as the point of solidification is approached, and that the rate of such increase in hardness diminishes as the temperature of the substance becomes lower. There is no reason to believe that ice forms an exception to this general rule governing nearly all substances, but that it also passes on melting through a softening process. It may theref...
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Add this copy of Shaft-Sinking Under Difficult Conditions to cart. $19.72, new condition, Sold by Ingram Customer Returns Center rated 5.0 out of 5 stars, ships from NV, USA, published 2022 by Legare Street Press.
Add this copy of Shaft-Sinking Under Difficult Conditions to cart. $29.16, new condition, Sold by Ingram Customer Returns Center rated 5.0 out of 5 stars, ships from NV, USA, published 2022 by Legare Street Press.
Add this copy of Shaft-Sinking Under Difficult Conditions to cart. $30.87, new condition, Sold by Ria Christie Books rated 5.0 out of 5 stars, ships from Uxbridge, MIDDLESEX, UNITED KINGDOM, published 2022 by Legare Street Press.
Add this copy of Shaft-Sinking Under Difficult Conditions to cart. $41.33, new condition, Sold by Ria Christie Books rated 5.0 out of 5 stars, ships from Uxbridge, MIDDLESEX, UNITED KINGDOM, published 2022 by Legare Street Press.
