The Principles of Field Drainage

orig. cloth Rubbed. Binding corner bumps. Good. 12pp photoplates. 21x14cm, xi,165,(12)pp Contents: Former neglect of drainage work. Measures of Government assistance; The history of field-draining developments in Great Britain; The moisture properties of soil. The incidence of drainage; Percolation. Permeability. The water table. The special case of clay land; Drainage conditions in the field. (Soil and site factors. The main types of drainage circumstances); The use of published maps in field-drainage work; The investigation of field-drainage problems; Ditches; Tile draining. Methods and principles. Renovation of old systems. Design and materials; Mole draining. Suitable soils, details, cuases of failure, machinery, procedure; The way in which drains work. Rates of flow from outfalls; Drainage of aerodromes, sports grounds and field fortifications; Field drainage, river flow and floods; Foeld drainage. Present position and progress. Rubbed. Binding corner bumps. Good.