Miller, Kempster Blanchard, 1870-1933 · New York : McGraw publishing company · leaf 863
each layer is finished the sides of the trenchshould be filled to the top of that layer with the same concrete asthat used for the foundation. The space between the tiles in a layerand between the layers should be carefully filled with good cementmortar mixed thin enough to readily fill the… … FIG. 618.-TWENTY-DUCT SUBWAY. hydraulic cement, two parts of clean sharp sand, and five parts ofbroken stone,screened gravel,or brokenbrick. Thesize of the brokenstone or brick or gravel should not be larger than one inch in anydimensions. The cement and sand should be thoroughly mixedwhile dry,…
Telephone
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