https://www.usa.gov/copyrighted-government-workshttps://www.rawpixel.com/image/12283832Edit ImageSaveSaveEditCropCustom TextForge shop. Gas heated furnace. Keystone Drilling Company, Beaver Falls, 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 929 px | 300 dpiLarge JPEG 3500 x 2710 px | 300 dpiBest Quality JPEG 13876 x 10745 px | 300 dpiTIFF 13876 x 10745 px | 300 dpi | 142.22 MBFree DownloadForge shop. Gas heated furnace. Keystone Drilling Company, Beaver Falls, Pennsylvania. Sourced from the Library of Congress.More