https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/14014245Edit ImageSaveSaveEditCropCustom TextCivil engineering: wooden centring for Blackfriars Bridge (above), Waterloo Bridge (below). Engraving by R. Roffe, 1848.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 1200 x 929 px | 300 dpiLarge JPEG 3064 x 2372 px | 300 dpiFree DownloadCivil engineering: wooden centring for Blackfriars Bridge (above), Waterloo Bridge (below). Engraving by R. Roffe, 1848.More