Economy. 19th century. Mining. Coal mine with several floors. Engraving. "The Art of the Illustration", 1888.

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Keywords: 19th, age, century, class, coal, contemporary, cut, dig, digging, economy, engine, engraving, extraction, history, machine, machinery, miner, mineral, mineralogy, mining, section, subsoil, subterranean, subterraneous, tunnel, work, worker, workerism, workers, working