https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13963227Edit ImageSaveSaveEditCropCustom TextPigments: mills for grinding colours, and a man grinding at a muller, with a ventilator hood above. Coloured engraving by J. Pass, 1824.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 930 x 1200 px | 300 dpiLarge JPEG 2405 x 3102 px | 300 dpiFree DownloadPigments: mills for grinding colours, and a man grinding at a muller, with a ventilator hood above. Coloured engraving by J. Pass, 1824.More