Retired coal miner leading visitors on a tour of the Beckley Exhibition Coal Mine, Beckley, West Virginia, USA. The low-seam coal mine operated during the first half of the 20th century as the Phillips-Sprague Mine. The guide shows a cage that miners would use to take a canary into the mine; the bird's sudden death would warn miners to evacuate because of the presence of toxic gases. | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / West, Jim |
Bildgröße: | 3928 px × 2449 px |
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