https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13987225Edit ImageSaveSaveEditCropCustom TextFranklin Institute, Philadelphia. Coloured engraving by Fenner Sears & Co., 1830, after C. Burton.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 798 x 1200 px | 300 dpiLarge JPEG 2329 x 3500 px | 300 dpiBest Quality JPEG 2346 x 3526 px | 300 dpiFree DownloadFranklin Institute, Philadelphia. Coloured engraving by Fenner Sears & Co., 1830, after C. Burton.More