https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13971954Edit ImageSaveSaveEditCropCustom TextHydraulics: a water-wheel with a pressure relieving device, side elevation. Engraving by J. B. Taylor after J. Pinchback.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 1200 x 751 px | 300 dpiLarge JPEG 3447 x 2156 px | 300 dpiFree DownloadHydraulics: a water-wheel with a pressure relieving device, side elevation. Engraving by J. B. Taylor after J. Pinchback.More