https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/14010638Edit ImageSaveSaveEditCropCustom TextEhrenfried Hagendorn. Line engraving by J. A. Boener.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 967 x 1200 px | 300 dpiLarge JPEG 2400 x 2977 px | 300 dpiFree DownloadEhrenfried Hagendorn. Line engraving by J. A. Boener.More