https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13976986Edit ImageSaveSaveEditCropCustom TextA physician holds up a urine flask to the light, while another scholar reads the properties of urine from a book. Woodcut, 1531.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 1162 x 1200 px | 300 dpiLarge JPEG 2672 x 2760 px | 300 dpiFree DownloadA physician holds up a urine flask to the light, while another scholar reads the properties of urine from a book. Woodcut, 1531.More