https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13980064Edit ImageSaveSaveEditCropCustom TextClocks: a Ferguson clock, face (right), and diagrams of the mechanism (left). Engraving by A. Bell.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 929 x 1200 px | 300 dpiLarge JPEG 2350 x 3034 px | 300 dpiFree DownloadClocks: a Ferguson clock, face (right), and diagrams of the mechanism (left). Engraving by A. Bell.More