https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13968889Edit ImageSaveSaveEditCropCustom TextEngineering: large cogs meshing together, and diagrams of epicycloid curves. Coloured lithograph, 1905, by Stanislas Petit.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 1200 x 782 px | 300 dpiLarge JPEG 3426 x 2234 px | 300 dpiFree DownloadEngineering: large cogs meshing together, and diagrams of epicycloid curves. Coloured lithograph, 1905, by Stanislas Petit.More