Die Schlämmanalyse

Abstract

MECHANICAL methods of analysis by elutriation, originally applied almost exclusively to soil analysis, are finding increasing value in the examination of many technical products. This book deals with particles ranging from 1 mm. to 0.001 mm. diameter, and is mainly concerned with sedimentation methods, although sieving and air separation are touched upon. The first third of the letterpress treats of the theory of the falling particle; the next third describes the apparatus used, and more than sixty types of sedimentation vessels are figured; the last third shows the practical applications of the methods. With such a host of different types of apparatus, all designed for the same purpose and differing only in detail, it is not easy to appreciate the various advantages and disadvantages. A greater measure of criticism might have been given, and comparison of results obtained with different types would have been instructive. The question of sieves receives rather scant treatment, and standard sieves other than GermUn are not mentioned. Nevertheless, the book forms a worthy addition to the monographs on colloidal subjects of which it is the tenth volume. Die Schlämmanalyse. Dr. Hermann Gessner Von. (Kolloidforschung in Einzeldarstellungen, heraus-gegeben von Herbert Freundlich, Band 10.) Pp. x + 244. (Leipzig: Akademische Verlagsgesell-schaft m.b.H., 1931.) 18 gold marks.