https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13995138Edit ImageSaveSaveEditCropCustom TextJohannes Friedrich Helvetius. Line engraving.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 752 x 1200 px | 300 dpiLarge JPEG 1092 x 1742 px | 300 dpiFree DownloadJohannes Friedrich Helvetius. Line engraving.More