https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/14009566Edit ImageSaveSaveEditCropCustom TextGeorge Bidder, a mental calculator, as a boy. Aquatint by H. Meyer, 1817, after W. Waite.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 867 x 1200 px | 300 dpiLarge JPEG 2529 x 3500 px | 300 dpiBest Quality JPEG 2546 x 3524 px | 300 dpiFree DownloadGeorge Bidder, a mental calculator, as a boy. Aquatint by H. Meyer, 1817, after W. Waite.More