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Graduation tower
Additional recommended knowledgeA graduation tower consists of a wooden wall-like frame which is stuffed with bundles of brushwood. It increases the concentration of a solution of mineral salts. The salty water runs down the tower, and — through the action of breeze and sun — partly evaporates; at the same time certain mineral content of the solution are left behind on the sticks of brushwood.
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This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Graduation_tower". A list of authors is available in Wikipedia. |