Responsible government in the Dominions: Responsible government in the Dominions

Responsible government in the Dominions (Vol. 3)

Bibliographic data

Monograph

Identifikator:: 1015576184

URN:: urn:nbn:de:zbw-retromon-27026

Document type:: Monograph

Author:: Leitner, Friedrich http://d-nb.info/gnd/139681477

Title:: Bilanztechnik und Bilanzkritik

Edition:: Sechste und siebente Auflage

Place of publication:: Berlin

Publisher:: Walter de Gruyter & Co., vormals G.J. Göschen'sche Verlagshandlung - J. Guttentag, Verlags-Buchhandlung - Georg Reimer - Karl J. Trübner - Veit & Comp.

Year of publication:: 1923

Scope:: 1 Online-Ressource (VIII, 424 Seiten)

Digitisation:: 2018

Collection:: Business and Management Classics

Usage license:: Get license information via the feedback formular.

Chapter

Document type:: Monograph

Structure type:: Chapter

Title:: III. Außerordentliche Bilanzen

Collection:: Business and Management Classics

CHAPTER XIII CLAY Essextiar ProperTIES OF CLAY—Clay is the typical member of the argillaceous rocks (Latin, argilla, clay). The best known property of clay is its plasticity when moist, and the name appears to come from the same root as clog. The essential characteristic of clay (cf. p. 191) is the size of its particles, which are not more than one five-thousandth of an inch (-005 mm.) in diameter. As explained on page 191 the distinction between sand! and clay is physical and not chemical. The plasticity of clay is not fully understood. It has been attributed to chemical composition, though a sand may be made plastic by being finely ground without any change in composition; to water, but materials that are identical in water content vary in plasticity; to the shape of the particles, but either the elongated or globular form are re- garded as favourable to it (Ries, Clays, 1906, pp. 97, 99); and to the presence of a colloid (H. E. Ashley, U.S.G.S., Bull. 388, 1909, pp. 42, 59). The plasticity of clay has no single cause, but is due to various factors, such as a colloid or very fine particles in the interstices, which allow move- ment between the particles, and act like water in quicksand. The shape of the particles naturally has some influence, Common clay is made by the breaking up of rocks and the deposition of the finer particles as a bed. Clay usually con- tains grains of silica in a base of silicate of alumina, with small amounts of carbonate of lime and an iron compound. The main industrial value of clay depends upon the fact ! For British and important foreign sands and their economic factors, see P. G. H. Boswell, British Resources of Sands used in Glass Manu- facture, 1918, which includes an account of sands used for most other purposes. il

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