https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13975988Edit ImageSaveSaveEditCropCustom TextJohannes Friedrich Helvetius. Line engraving by D.C.C. Fleischmann.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 709 x 1200 px | 300 dpiLarge JPEG 2016 x 3412 px | 300 dpiFree DownloadJohannes Friedrich Helvetius. Line engraving by D.C.C. Fleischmann.More