Chapter Xiii.--Methods and Cost of Constructing Retaining

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Introduction--Comparative Economy of Plain and Reinforced Concrete Walls--Form Construction--Mixing and Placing Concrete--Walls in Trench--Chicago Drainage Canal--Grand Central Terminal, New York, N. Y.--Wall for Railway Yard--Footing for Rubble Stone Retaining Walls--Track Elevation, Allegheny, Pa.