Instructions for the Analysis of Soils Limestones And Manures
Instructions for the Analysis of Soils Limestones And Manures
Johnston, Jas. F. W. (James Finlay Weir), 1796-1855
The book Instructions for the Analysis of Soils Limestones And Manures was written by author Johnston, Jas. F. W. (James Finlay Weir), 1796-1855 Here you can read free online of Instructions for the Analysis of Soils Limestones And Manures book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Instructions for the Analysis of Soils Limestones And Manures a good or bad book?
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EARTHY MATTERS OF THE SOIL. 53 appears, the treatment with sulphuric acid is to be repeated a second, and if necessary, a third time, till everything soluble is taken up by the sulphuric acid. By this treatment the insoluble silictates are decomposed, and only pure silica remains in the crucible undissolved. This may be collected on the filter, washed, dried, heated to redness, and weighed. Its weight represents the pro- portion of insoluble silicious matter in the soil. The solution in sulphur...ic acid may contain alumina, oxide of iron, lime, and magnesia. These are to be sepa- rated, and their several weights determined by the pro- cesses already described. Only in rare cases will this solution contain potash or soda, or phosphoric acid ; but if the presence of these substances be suspected, they also can be sought for and separated as described in the pre- ceding section. 55. Second. A. Or the portion of soil on which hot muriatic acid refuses to act may be mixed with three times its weight of a mixture of carbonate of potash with carbonate of soda, in equal equivalents, * and heated to fusion in a platinum crucible.
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