A Guide to the Scientific Examination of Soils Comprising Select Methods of Mec
A Guide to the Scientific Examination of Soils Comprising Select Methods of Mec
Felix Wahnschaffe
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When entirely cold the tube is opened in the manner described on p. 84, the contents are rinsed into a beaker, diluted with water, and heated until an odor of bromine is no longer perceptible. Now filter the soil off, and precipitate the sulphuric acid in the filtrate in the above- mentioned manner. The sulphuric acid obtained from the aqueous extract is then deducted from the total sul- phuric acid, and the rest calculated to sulphur by multi- plying it by the factor 0. 4. 144 THE EXAMINATION ...OF SOILS. In the presence of large quantities of gypsum this method is not available, as, in this case, all the sulphates are not extracted by the aqueous extract. IX. DETERMINATION OF VARIOUS PROPERTIES OF THE SOIL WHICH ARE DEPENDENT PARTIALLY ON PHYSICAL AND PARTIALLY ON CHEMICAL CAUSES. A. Weight of the soil. We distinguish the specific grav- ity, and the absolute volume or liter weight of the soil. For determining them the following methods are suitable : 1. Determination of the specific gravity.
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