https://www.usa.gov/copyrighted-government-workshttps://www.rawpixel.com/image/12290287Edit ImageSaveSaveEditCropCustom TextPittsburgh, Pennsylvania (vicinity). Montour no. 4 mine of the Pittsburgh Coal Company. Miners getting their head and safety lamps. Sourced from the Library of Congress.View public domain image source hereMorePublic DomainFree CCO U.S. Government image for Personal and Business useInfoView CC0 LicenseEditorial use only JPEGTIFFSmall JPEG 1117 x 1200 px | 300 dpiLarge JPEG 3258 x 3500 px | 300 dpiBest Quality JPEG 4828 x 5187 px | 300 dpiTIFF 4828 x 5187 px | 300 dpi | 47.79 MBFree DownloadPittsburgh, Pennsylvania (vicinity). Montour no. 4 mine of the Pittsburgh Coal Company. Miners getting their head and safety lamps. Sourced from the Library of Congress.More