https://www.usa.gov/copyrighted-government-workshttps://www.rawpixel.com/image/12314903Edit ImageSaveSaveEditCropCustom TextTapping a blast furnace for slag, Pittsburgh, Pennsylvania. 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 1200 x 844 px | 300 dpiLarge JPEG 3500 x 2462 px | 300 dpiBest Quality JPEG 4284 x 3013 px | 300 dpiTIFF 4284 x 3013 px | 300 dpi | 24.64 MBFree DownloadTapping a blast furnace for slag, Pittsburgh, Pennsylvania. Sourced from the Library of Congress.More