https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13973164Edit ImageSaveSaveEditCropCustom TextSir David Brewster. Reproduction of chalk drawing by R. Lehmann, 1857.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 916 x 1200 px | 300 dpiLarge JPEG 2582 x 3384 px | 300 dpiFree DownloadSir David Brewster. Reproduction of chalk drawing by R. Lehmann, 1857.More