https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13997228Edit ImageSaveSaveEditCropCustom TextJustus von Liebig. Stipple engraving by C. Cook.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 847 x 1200 px | 300 dpiLarge JPEG 2308 x 3269 px | 300 dpiFree DownloadJustus von Liebig. Stipple engraving by C. Cook.More