https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/14007233Edit ImageSaveSaveEditCropCustom TextPlan, cross-section and elevation of the trestle on which to work on a block of marble. Engraving by R. Bénard after Bourgeois.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 768 x 1200 px | 300 dpiLarge JPEG 1380 x 2156 px | 300 dpiFree DownloadPlan, cross-section and elevation of the trestle on which to work on a block of marble. Engraving by R. Bénard after Bourgeois.More