Annual Report for ... with Accompanying Papers, Volumen14

absorption acid amount appear argillaceous average becomes beds block blue bottom Brick and Tile Brick Company carbonate carried cent chemical City City Brick Coal Measures color Combined Common brick Company complete considerable construction contain continuous deposits developed draft drain tile drift dryer effect entire exposed extent feet fire clay fluxes fuel gases give given grade grains gray heat important inches Iowa iron kiln known latter less lime Limestone Loess lower machine manufacture material means method mineral Moines mold necessary occur operation oxide particles pass paving Pipe plant plastic portion possible practically present removed river rock sand Sandstone Shale showing silica Soft mud stack steam Stiff mud strength substance surface temperature tests thickness Tile Company tion usually varying ware weathering