https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/14011863Edit ImageSaveSaveEditCropCustom TextA man sitting inside a large wooden frame holding on to straps as the wheels turn. Engraving by J. Walker.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 824 x 1200 px | 300 dpiLarge JPEG 2208 x 3214 px | 300 dpiFree DownloadA man sitting inside a large wooden frame holding on to straps as the wheels turn. Engraving by J. Walker.More