Im Bundesstaat Michigan sind viele Minen, hier eine typische Schacht- und Förderanlage. America, North, USA, United States of America, travel, 1910s, 1920s, 20th century, archive, Carl Simon, history, historical, mining, mine, coal, pit, shaft installation, shaft plant, industry, industrial, hand coloured glass slide

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Photo credit: © Carl Simon / Alamy / Afripics
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