https://www.usa.gov/copyrighted-government-workshttps://www.rawpixel.com/image/12296694Edit ImageSaveSaveEditCropCustom TextEl Paso, Texas, Phelps Dodge refining company. Electrolytic tanks in which sheets of pure copper are formed. The sheets are later melted and cast into ingots. 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 1192 x 1200 px | 300 dpiLarge JPEG 3476 x 3500 px | 300 dpiBest Quality JPEG 4971 x 5005 px | 300 dpiTIFF 4971 x 5005 px | 300 dpi | 47.48 MBFree DownloadEl Paso, Texas, Phelps Dodge refining company. Electrolytic tanks in which sheets of pure copper are formed. The sheets are later melted and cast into ingots. Sourced from the Library of Congress.More