https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/14021164Edit ImageSaveSaveEditCropCustom TextFriedrich Wilhelm Bessel. Reproduction of line engraving by E. Mandel after Wolff.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 897 x 1200 px | 300 dpiLarge JPEG 2514 x 3365 px | 300 dpiFree DownloadFriedrich Wilhelm Bessel. Reproduction of line engraving by E. Mandel after Wolff.More