Graduation tower

Rarity: Common

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At a glance

Class

Notion

Domain

Science and technology

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What Wikipedia says

A graduation tower (occasionally referred to as a thorn house) is a structure, used in the production of salt, that removes water from a saline solution by evaporation, increasing its concentration of mineral salts.

Excerpt from the Wikipedia article “Graduation tower”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: chrisaliv, CC BY-SA 4.0, via Wikimedia Commons.