https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/14003445Edit ImageSaveSaveEditCropCustom TextCivil engineering: three types of wooden centring for bridges. Engraving by J. Davis, 1820, after R. Tredgold.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 1200 x 985 px | 300 dpiLarge JPEG 2952 x 2422 px | 300 dpiFree DownloadCivil engineering: three types of wooden centring for bridges. Engraving by J. Davis, 1820, after R. Tredgold.More