https://www.usa.gov/copyrighted-government-workshttps://www.rawpixel.com/image/12295443Edit ImageSaveSaveEditCropCustom TextPhelps Dodge refining company, El Paso, Texas. Charging sheets of copper, produced by electrolysis, into a reverbatory furnace. 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 1183 x 1200 px | 300 dpiLarge JPEG 3451 x 3500 px | 300 dpiBest Quality JPEG 5156 x 5229 px | 300 dpiTIFF 5156 x 5229 px | 300 dpi | 51.45 MBFree DownloadPhelps Dodge refining company, El Paso, Texas. Charging sheets of copper, produced by electrolysis, into a reverbatory furnace. Sourced from the Library of Congress.More