1851 Great Exhibition: Official Catalogue: Class IX.: William James Sadler
156. SADLER, WILLIAM JAMES, Bentham, Swindon, Wilts, - Inventor.
Agricultural chimney filter drain. The portions exhibited, represent the external filter pipes, a, b, and c, to slide in the chimney, d, e, for conveying to the drain any surface water which may accumulate in low places on stiff clay soils, through which it cannot penetrate to the drain, till it has considerably injured the crop. The pipes act as filters, retaining iu the bottom the mud or other matter which might choke the drain. The pipes are lifted out of the chimney to unfit them, and may be left out when sufficient water has accumulated to flush the drain, if it should be required. These drains are shown in the preceding cut.
Draining tools:— Paring knife; spade for surface; top bit; crummer for the same; pick and tomahawk; bottom bit; crummer for the same; rammer for levelling bed for pipes; tool for placing pipes, g, in the preceding cut, and drag for filling in.
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