https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13985759Edit ImageSaveSaveEditCropCustom TextJedediah Buxton, a mental calculator. Line engraving.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 728 x 1200 px | 300 dpiLarge JPEG 2123 x 3500 px | 300 dpiBest Quality JPEG 2140 x 3528 px | 300 dpiFree DownloadJedediah Buxton, a mental calculator. Line engraving.More