A Course of Practical Work in the Chemistry of the Garden, for Teachers and Students of Horticulture Gardening and Rural Science (Classic Reprint)

The ash contains calcium (lime), potassium, iron, carbonates, sulphates, phosphates, etc., and in those cases in which it is obtained in quantity (e.g. bonfire ashes), is of value as a fertiliser. EXPERIMENT I. Preparation of Plant A sh. Some leaves or other portions of plants are placed in a porcelain basin, and heated over a Bunsen burner. Steam is at first produced from water in the material, and then charring occurs owing to the burning of the dry matter. The heating is continued until all blackness due to the presence of unburnt carbonaceous matter disappears, and the greyish or white residue of plant ash is allowed to cool and used for the next experiment.
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