Chapter Xvi.--Methods and Cost of Lining Tunnels and

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Introduction--Capitol Hill Tunnel, Pennsylvania R. R., Washington, D. C.--Constructing Side Walls in Relining Mullan Tunnel--Lining a Short Tunnel, Peekskill, N. Y.--Cascade Tunnel Great Northern Ry.--Relining Hodges Pass Tunnel, Oregon Short Line Ry.--Lining a 4,000-ft. Tunnel--Method of Mixing and Placing Concrete for a Tunnel Lining--Gunnison Tunnel--New York Rapid Transit Subway--Traveling Forms for Lining New York Rapid Transit Railway Tunnels--Subway Lining, Long Island R. R., Brooklyn, N. Y.