Drifts, slopes, and shafts,Similarlongwall workings from "The Colliery Manager's Handbook ... Second edition, revised, with additions"[Portable siege ladder]. Book illustration from Library of CongressMoreRelatedDrifts, slopes, and shafts,Drifts, slopes, and shafts,Drifts, slopes, and shafts,Drifts, slopes, and shafts,Drifts, slopes, and shafts,Drifts, slopes, and shafts,MoreDrifts, slopes, and shafts,file_downloadDownloadcrop_originalOrder Printrate_reviewdescriptionSummaryAlso available in digital form.label_outlineTagsshaft sinkingtunnelingmine timberingmine drainageselected digitized booksinternational correspondence schoolshigh resolutionschool booksschooleducationdate_rangeDate01/01/1921createSourceLibrary of CongresslinkLinkhttps://www.loc.gov/copyrightCopyright infoPublic Domain