Pittsburgh, Pennsylvania (vicinity). Montour no. 4 mine of the Pittsburgh Coal Company. Coal miner waiting to go… https://www.rawpixel.com/image/12240254/photo-image-face-person-public-domainFree Image from public domain license[Untitled photo, possibly related to: Pittsburgh, Pennsylvania (vicinity). Montour no. 4 mine of the Pittsburgh Coal… https://www.rawpixel.com/image/12243764/photo-image-face-person-public-domainFree Image from public domain licensePittsburgh, Pennsylvania (vicinity). Montour no. 4 mine of the Pittsburgh Coal Company. Laying track. Sourced from the… https://www.rawpixel.com/image/12306933/image-person-public-domain-manFree Image from public domain licensePittsburgh, Pennsylvania (vicinity). Montour no. 4 mine of the Pittsburgh Coal Company. Mine engineers checking surveys… https://www.rawpixel.com/image/12307186/image-face-person-technologyFree Image from public domain licensePittsburgh, Pennsylvania (vicinity). 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Sourced… https://www.rawpixel.com/image/12289993/photo-image-face-people-public-domainFree Image from public domain license[Untitled photo, possibly related to: Pittsburgh, Pennsylvania (vicinity). Montour no. 4 mine of the Pittsburgh Coal… https://www.rawpixel.com/image/12289994/photo-image-people-public-domain-manFree Image from public domain licensePittsburgh, Pennsylvania (vicinity). Montour no. 4 mine of the Pittsburgh Coal Company. Mined out area which is being… https://www.rawpixel.com/image/12290256/photo-image-background-frame-patternFree Image from public domain licensePittsburgh, Pennsylvania (vicinity). Montour no. 4 mine of the Pittsburgh Coal Company. Mined out area which is being… https://www.rawpixel.com/image/12289939/photo-image-frame-road-public-domainFree Image from public domain licensePittsburgh, Pennsylvania (vicinity). Montour no. 4 mine of the Pittsburgh Coal Company. Hoist in the tipple house. Sourced… https://www.rawpixel.com/image/12290224/photo-image-person-technology-public-domainFree Image from public domain licensePittsburgh, Pennsylvania (vicinity). Montour no. 4 mine of the Pittsburgh Coal Company. Mine foreman waiting for the… https://www.rawpixel.com/image/12290253/photo-image-face-people-public-domainFree Image from public domain licensePittsburgh, Pennsylvania (vicinity). Montour no. 4 mine of the Pittsburgh Coal Company. Gathering coal. Sourced from the… https://www.rawpixel.com/image/12290252/photo-image-person-public-domain-architectureFree Image from public domain licensePittsburgh, Pennsylvania (vicinity). Montour no. 4 mine of the Pittsburgh Coal Company. Lunch time in the machine shop.… https://www.rawpixel.com/image/12290267/photo-image-people-public-domain-factoryFree Image from public domain licensePittsburgh, Pennsylvania (vicinity). Montour no. 4 mine of the Pittsburgh Coal Company. 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Miners getting their head and safety… https://www.rawpixel.com/image/12290287/photo-image-people-public-domain-hospitalFree Image from public domain licensePittsburgh, Pennsylvania (vicinity). Montour no. 4 mine of the Pittsburgh Coal Company. Miners getting their head and safety… https://www.rawpixel.com/image/12290022/photo-image-face-person-public-domainFree Image from public domain licensePittsburgh, Pennsylvania (vicinity). Montour no. 4 mine of the Pittsburgh Coal Company. Hoist in the tipple house. Sourced… https://www.rawpixel.com/image/12290228/photo-image-person-technology-public-domainFree Image from public domain licensePittsburgh, Pennsylvania (vicinity). Montour no. 4 mine of the Pittsburgh Coal Company. Miners getting their head and safety… https://www.rawpixel.com/image/12289964/photo-image-person-public-domain-factoryFree Image from public domain licensePittsburgh, Pennsylvania (vicinity). Montour no. 4 mine of the Pittsburgh Coal Company. Miners getting their head and safety… https://www.rawpixel.com/image/12290277/photo-image-face-person-public-domainFree Image from public domain license[Untitled photo, possibly related to: Pittsburgh, Pennsylvania (vicinity). Westland coal mine. "Mantrip" going into a "drift… https://www.rawpixel.com/image/12290009/photo-image-face-person-public-domainFree Image from public domain licensePittsburgh, Pennsylvania (vicinity). Montour no. 4 mine of the Pittsburgh Coal Company. Safety lamps in lamp house. Sourced… https://www.rawpixel.com/image/12289961/photo-image-people-balloon-public-domainFree Image from public domain licensePittsburgh, Pennsylvania (vicinity). Montour no. 4 mine of the Pittsburgh Coal Company. Transportation foreman. Sourced from… https://www.rawpixel.com/image/12290276/photo-image-face-hand-peopleFree Image from public domain licensePittsburgh, Pennsylvania (vicinity). Montour no. 4 mine of the Pittsburgh Coal Company. Noon in the "bean hole". Sourced… https://www.rawpixel.com/image/12289959/photo-image-face-hand-peopleFree Image from public domain licensePittsburgh, Pennsylvania (vicinity). Montour no. 4 mine of the Pittsburgh Coal Company. Testing for gas. Sourced from the… https://www.rawpixel.com/image/12290230/photo-image-person-public-domain-natureFree Image from public domain licensePittsburgh, Pennsylvania (vicinity). Montour no. 4 mine of the Pittsburgh Coal Company. Drilling. Sourced from the Library… https://www.rawpixel.com/image/12290281/photo-image-person-public-domain-manFree Image from public domain licensePittsburgh, Pennsylvania (vicinity). Montour no. 4 mine of the Pittsburgh Coal Company. Firing a blast of dynamite. Sourced… https://www.rawpixel.com/image/12290258/photo-image-face-plant-peopleFree Image from public domain licensePittsburgh, Pennsylvania (vicinity). Montour no. 4 mine of the Pittsburgh Coal Company. Mine car operation off cable in… https://www.rawpixel.com/image/12289998/photo-image-person-technology-public-domainFree Image from public domain licensePittsburgh, Pennsylvania (vicinity). Montour no. 4 mine of the Pittsburgh Coal Company. Mine foreman waiting for the… https://www.rawpixel.com/image/12290273/photo-image-face-people-public-domainFree Image from public domain licensePittsburgh, Pennsylvania (vicinity). Montour no. 4 mine of the Pittsburgh Coal Company. Electrically driven mine engine.… https://www.rawpixel.com/image/12290031/photo-image-person-public-domain-manFree Image from public domain license[Untitled photo, possibly related to: Pittsburgh, Pennsylvania (vicinity). Montour no. 4 mine of the Pittsburgh Coal… https://www.rawpixel.com/image/12290264/photo-image-people-public-domain-factoryFree Image from public domain licensePittsburgh, Pennsylvania (vicinity). Montour no. 4 mine of the Pittsburgh Coal Company. Timbering. Sourced from the Library… https://www.rawpixel.com/image/12290269/photo-image-person-public-domain-womanFree Image from public domain licensePittsburgh, Pennsylvania (vicinity). Montour no. 4 mine of the Pittsburgh Coal Company. Gathering coal. Sourced from the… https://www.rawpixel.com/image/12289960/photo-image-person-public-domain-manFree Image from public domain license[Untitled photo, possibly related to: Pittsburgh, Pennsylvania (vicinity). Montour no. 4 mine of the Pittsburgh Coal… https://www.rawpixel.com/image/12290025/photo-image-person-public-domain-factoryFree Image from public domain licensePittsburgh, Pennsylvania (vicinity). Montour no. 4 mine of the Pittsburgh Coal Company. Noon in the "bean hole". Sourced… https://www.rawpixel.com/image/12290255/photo-image-face-person-headphonesFree Image from public domain licensePittsburgh, Pennsylvania (vicinity). Montour no. 4 mine of the Pittsburgh Coal Company. Supply store in lamp house of mine.… https://www.rawpixel.com/image/12289966/photo-image-person-public-domain-factoryFree Image from public domain licensePittsburgh, Pennsylvania (vicinity). Montour no. 4 mine of the Pittsburgh Coal Company. Noon in the "bean hole". Sourced… https://www.rawpixel.com/image/12289963/photo-image-face-hand-peopleFree Image from public domain licensePittsburgh, Pennsylvania (vicinity). Montour no. 4 mine of the Pittsburgh Coal Company. Adjusting block signal. Sourced from… https://www.rawpixel.com/image/12289936/photo-image-person-art-public-domainFree Image from public domain licensePittsburgh, Pennsylvania (vicinity). Montour no. 4 mine of the Pittsburgh Coal Company. Noon in the "bean hole". Sourced… https://www.rawpixel.com/image/12289965/photo-image-face-hand-personFree Image from public domain license[Untitled photo, possibly related to: Pittsburgh, Pennsylvania (vicinity). 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