https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/14007335Edit ImageSaveSaveEditCropCustom TextCross-section of a shaft for extracting rubble from the pit. Etching by Bénard after L.J. Goussier.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 751 x 1200 px | 300 dpiLarge JPEG 1276 x 2040 px | 300 dpiFree DownloadCross-section of a shaft for extracting rubble from the pit. Etching by Bénard after L.J. Goussier.More