https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/14018486Edit ImageSaveSaveEditCropCustom TextJohann Abraham Mercklin. Line engraving by M. Bernigeroth.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 793 x 1200 px | 300 dpiLarge JPEG 2180 x 3299 px | 300 dpiFree DownloadJohann Abraham Mercklin. Line engraving by M. Bernigeroth.More