https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/14015803Edit ImageSaveSaveEditCropCustom TextA man is testing the sharpness of a blade which he has been grinding on the wheel turned by the boy. Engraving by Gio. Volpato after Domenico Maggiotto.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 937 x 1200 px | 300 dpiLarge JPEG 2656 x 3402 px | 300 dpiFree DownloadA man is testing the sharpness of a blade which he has been grinding on the wheel turned by the boy. Engraving by Gio. Volpato after Domenico Maggiotto.More