A DOUBLE CENTRIFUGE TUBE FOR THE SEPARATION OF SOIL MINERALS BY MEANS OF HEAVY LIQUIDS

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Abstract
A double centrifuge tube, consisting of an inner and an outer tube for the quantitative separation of mineral groups, is descr. The manipulations necessary to make typical heavy liquid separations of sands are given in detail. Some results obtained on the very fine sand fraction (particles 0.1-0.05 mm. diam.) of some soils, and a list of the minerals identified in the different specific gravity groups are given.