Aggregation and Flow of Solids: Being the Records of an Experimental Study of the Micro-structure and Physical Properties of Solids in Various States of Aggregation, 1900-1921 (Google eBook)

Front Cover
Macmillan and Company, limited, 1921 - Solids - 256 pages
0 Reviews
  

What people are saying - Write a review

We haven't found any reviews in the usual places.

Common terms and phrases

Popular passages

Page 155 - ... fibrous or cellular core is a source of weakness and must considerably reduce the tenacity of the metal. It is possible that the flowing action to which the metal has been subjected may have caused the disengagement of occluded or dissolved gases at the moment of the passage of the C into the A phase. A proportion of the gas disengaged would naturally be driven in towards the centre of the wire, as the outer skin must be comparatively impervious. The silver wires occasionally showed a slight...
Page 125 - In these circumstances there can be no doubt that, from the point of view of the civil population, the occupying Power was lawfully wielding the State authority and, with it, the authority of the criminal law.
Page 229 - Siedentopf have succeeded in making these ultramicroscopic particles visible in the microscope as diffraction disks; they have, further, counted the number of particles per unit area and have from the intensity of their reflection calculated their size. In ruby glass the size of the particles in different specimens was found to vary from 4 to 791 millionths of a millimeter. No relation was found to hold between the color of the particles and their absolute size. This conclusion is in direct contradiction...
Page 229 - ... specimens was found to vary from 4 to 791 millionths of a millimeter. No relation was found to hold between the color of the particles and their absolute size. This conclusion is in direct contradiction of Faraday's belief, already referred to. Mr. J. Maxwell Garnett has recently shown that the color of metallic glasses and films is determined, not only by the absolute size of the metal particles, but also by the proportion of the total volume they occupy in the medium in which they are diffused....
Page 155 - A, vol. 179 (1888), p. 339. copper wires showed the cupped formation at the fractured ends. This formation is evidently due to the lower tenacity of the central core, which breaks before the outer skin has completely given way. The skin, therefore, appears like a sleeve pulled over the fractured ends of the core on both pieces. The weakness of the core is caused by the presence of gases, which no doubt originally appeared as bubbles, but which have been drawn out into fine tubes during the wire-drawing....
Page 192 - C., the cataclastic structure is not developed, and the whole movement is due to changes in the shape of the component calcite crystals, by twinning and gliding. (5) This latter movement is identical with that produced in metals by squeezing or hammering, a movement which in metals as a general rule, as in marble, is facilitated by increase of temperature. (6) There is therefore a flow of marble just as there is a flow of metals under suitable conditions of pressure.
Page 192 - The following is a summary of the results arrived at : 1. By submitting limestone or marble to differential pressures exceeding the elastic limit of the rock and under the conditions described in this paper, permanent deformation can be produced. 2. This deformation, when carried out at ordinary temperatures, is due in part to a cataclastic structure and in part to twinning and gliding movements in the individual crystals comprising the rock. 3. Both of these structures are seen in contorted...
Page 154 - The appearance of the fractured ends revealed several points of interest. In every case the copper wires showed the cupped formation at the extreme end. This formation' is evidently due to the lower tenacity of the central core, due to the presence of gas bubbles which have been drawn out into long tubes or cells. The silver wires occasionally showed a slight cupped formation, but in this...
Page 123 - Hardening thus results from the formation at all the internal surfaces of slip or shear of mobile layers similar to those produced on the surface by mechanical movement.
Page 231 - ... reflection and refraction, while the similar particles of the metallic conductor, gold, act as electrical resonators which pass on some of the light waves while reflecting others. Specimens of films of gold and silver and of magnesium oxide are exhibited on the table and on the lantern screen. When the metallic particles are in this state of open formation and relative transparence, it was found that the electrical conductivity of the films had completely disappeared. Films...

Bibliographic information