THE GREAT RAILWAY TUNNEL UNDER THE BT. CLAIR RIVER BETWEEN THE UNITED STATES AND CANADA. Fig. ISectional elevation and plan of tunnel ; A pump shaft B trick air shafts. C cuttings DD bulkheads. Fig 2Cross section of tunnel and river. Fig. 3 Map showing location. of Pt. Huron and Sarnia showing position of tunnel. Fig. 5Section and plan of iron shoe of shaft. Fig. 6Segment of cast iron of which the tunnel Is composed. THE GREAT RAILWAY TUNNEL UNDER THE ST. CLAIR RIVER BETWEEN THE UNITED STATES AND CANADA., scientific american, 1890-08-09
THE GREAT RAILWAY TUNNEL UNDER THE BT. CLAIR RIVER BETWEEN THE UNITED STATES AND CANADA. Fig. ISectional elevation and plan of tunnel ; A pump shaft B trick air shafts. C cuttings DD bulkheads. Fig 2Cross section of tunnel and river. Fig. 3 Map showing location. of Pt. Huron and Sarnia showing position of tunnel. Fig. 5Section and plan of iron shoe of shaft. Fig. 6Segment of cast iron of which the tunnel Is composed. THE GREAT RAILWAY TUNNEL UNDER THE ST. CLAIR RIVER BETWEEN THE UNITED STATES AND CANADA., scientific american, 1890-08-09
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