https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13979570Edit ImageSaveSaveEditCropCustom TextA slate quarry: processing of slate and the instruments used. Etching by Bénard after De la Croix.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 759 x 1200 px | 300 dpiLarge JPEG 1250 x 1977 px | 300 dpiFree DownloadA slate quarry: processing of slate and the instruments used. Etching by Bénard after De la Croix.More