https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/14013662Edit ImageSaveSaveEditCropCustom TextCalcination of ore and the instruments used in calcination. Etching by Bénard after Prevost.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 743 x 1200 px | 300 dpiLarge JPEG 1260 x 2036 px | 300 dpiFree DownloadCalcination of ore and the instruments used in calcination. Etching by Bénard after Prevost.More