An instrument for measuring the properties or carbon content of coal or anthracite.
From anthracis (Greek 'coal') + -meter (Greek metron, 'measure'). This technical instrument term emerged with coal chemistry in the 19th century.
Mining companies used anthracometers to grade coal quality—a miner who knew how to use one had a valuable skill, and it's a great example of how every industry creates its own specialized measuring tools.
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