https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13957580Edit ImageSaveSaveEditCropCustom TextRoyal patent adjustable invalid chair, shown in horizontal and upright positions. Coloured etching, 1810.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 710 x 1200 px | 300 dpiLarge JPEG 2053 x 3470 px | 300 dpiFree DownloadRoyal patent adjustable invalid chair, shown in horizontal and upright positions. Coloured etching, 1810.More