_Spons’ Dictionary of Engineering, Civil, Mechanical, Military, and Naval_; with technical terms in French, German, Italian, and Spanish, 3100 pp., and _nearly 8000 engravings_, in super-royal 8vo, in 8 divisions, 5_l._ 8_s._ Complete in 3 vols., cloth, 5_l._ 5_s._ Bound in a superior manner, half-morocco, top edge gilt, 3 vols., 6_l._ 12_s._ In super-royal 8vo, 1168 pp., _with 2400 illustrations_, in 3 Divisions, cloth, price 13_s._ 6_d._ each; or 1 vol., cloth, 2_l._; or half-morocco, 2_l._ 8_s._ A SUPPLEMENT TO SPONS’ DICTIONARY OF ENGINEERING. EDITED BY ERNEST SPON, MEMB. SOC. ENGINEERS. 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:— Acids, 207 pp. 220 figs. Alcohol, 23 pp. 16 figs. Alcoholic Liquors, 13 pp. Alkalies, 89 pp. 78 figs. Alloys. Alum. Asphalt. Assaying. Beverages, 89 pp. 29 figs. Blacks. Bleaching Powder, 15 pp. Bleaching, 51 pp. 48 figs.