https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13997285Edit ImageSaveSaveEditCropCustom TextLionel Lockyer. Line engraving by J. Sturt.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 760 x 1200 px | 300 dpiLarge JPEG 2217 x 3500 px | 300 dpiBest Quality JPEG 2230 x 3520 px | 300 dpiFree DownloadLionel Lockyer. Line engraving by J. Sturt.More