https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13976930Edit ImageSaveSaveEditCropCustom TextCivil engineering: the Menai box girder bridge. Lithograph by Day & son, 1849, after E. Clark.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 1200 x 733 px | 300 dpiLarge JPEG 3423 x 2090 px | 300 dpiFree DownloadCivil engineering: the Menai box girder bridge. Lithograph by Day & son, 1849, after E. Clark.More