Abacus, Counters, Speed Indicators, and Slide Rule. Agricultural Implements and Machinery. Air Compressors. Animal Charcoal Machinery. Antimony. Axles and Axle-boxes. Barn Machinery. Belts and Belting. Blasting. Boilers. Brakes. Brick Machinery. Bridges. Cages for Mines. Calculus, Differential and Integral. Canals. Carpentry. Cast Iron. Cement, Concrete, Limes, and Mortar. Chimney Shafts. Coal Cleansing and Washing. Coal Mining. Coal Cutting Machines. Coke Ovens. Copper. Docks. Drainage. Dredging Machinery. Dynamo-Electric and Magneto-Electric Machines. Dynamometers. Electrical Engineering, Telegraphy, Electric Lighting and its practical details, Telephones. Engines, Varieties of. Explosives. Fans. Founding, Moulding and the practical work of the Foundry. Gas, Manufacture of. Hammers, Steam and other Power. Heat. Horse Power. Hydraulics. Hydro-geology. Indicators. Iron. Lifts, Hoists, and Elevators. Lighthouses, Buoys, and Beacons. Machine Tools. Materials of Construction. Meters. Ores, Machinery and Processes employed to Dress. Piers. Pile Driving. Pneumatic Transmission. Pumps. Pyrometers. Road Locomotives. Rock Drills. Rolling Stock. Sanitary Engineering. Shafting. Steel. Steam Navvy. Stone Machinery. Tramways. Well Sinking. NOW COMPLETE. _With nearly 1500 illustrations_, in super-royal 8vo, in 5 Divisions, cloth. Divisions 1 to 4, 13_s._ 6_d._ each; Division 5, 17_s._ 6_d._; or 2 vols., cloth, £3 10_s._ SPONS’ ENCYCLOPÆDIA OF THE INDUSTRIAL ARTS, MANUFACTURES, AND COMMERCIAL PRODUCTS. Edited by C. G. WARNFORD LOCK, F.L.S. Among the more important of the subjects treated of, are the following:--