https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/14006987Edit ImageSaveSaveEditCropCustom TextThomas Graham Balfour. Etching by W. Strang after himself.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 858 x 1200 px | 300 dpiLarge JPEG 2243 x 3136 px | 300 dpiFree DownloadThomas Graham Balfour. Etching by W. Strang after himself.More