Walrus Leather, Emery, and Polishing Goods. Greene, Tweed & Co., 118 Chambers St., New York. Nickel Plating.--Sole manufacturers cast nickel anodes, pure nickel salts, importers Vienna lime, crocus, etc. Condit, Hanson & Van Winkle, Newark, N. J., and 92, and 94 Liberty St., New York. Presses, Dies, and Tools for working Sheet Metal, etc. Fruit & other can tools. Bliss & Williams, B'klyn, N. Y. Bradley's cushioned helve hammers. See illus. ad. p. 397. Instruction in Steam and Mechanical Engineering. A thorough practical education, and a desirable situation as soon as competent, can be obtained at the National Institute of Steam Engineering, Bridgeport, Conn. For particulars, send for pamphlet. Hydraulic Jacks, Presses and Pumps. Polishing and Buffing Machinery Patent Punches, Shears, etc. E. Lyon & Co., 470 Grand St., New York. Forsaith & Co., Manchester, N. H., & 207 Centre St., N. Y. Bolt Forging Machines, Power Hammers, Comb'd Hand Fire Eng. & Hose Carriages, New & 2d hand Machinery. Send stamp for illus. cat. State just what you want. For Mill Mach'y & Mill Furnishing, see illus. adv. p. 381. Air Compressors, Blowing Engines, Steam Pumping Machinery, Hydraulic Presses. Philadelphia Hydraulic Works, Philadelphia, Pa. For Patent Shapers and Planers, see ills. adv. p. 380. For Pat. Safety Elevators, Hoisting Engines, Friction Clutch Pulleys, Cut-off Coupling, see Frisbie's ad. p. 316. Machine Knives for Wood-working Machinery, Book Binders, and Paper Mills. Large knife work a specialty. Also manufacturers of Soloman's Parallel Vise. Taylor. Stiles & Co., Riegelsville, N. J. For Alcott's Improved Turbine, see adv. p. 297. Mineral Lands Prospected, Artesian Wells Bored, by Pa. Diamond Drill Co. Box 423, Pottsville, Pa. See p. 381. Rollstone Mac. Co's Wood Working Mach'y ad. p. 380 Improved Solid Emery Wheels and Machinery, Automatic Knife Grinders, Portable Chuck Jaws. _Important_, that users should have prices of these first class goods. American Twist Drill Co., Meredithville, N. H. For Standard Turbine, see last or next number. Burgess' Non-conductor for Heated Surfaces; easily applied, efficient, and inexpensive. Applicable to plain or curved surfaces, pipes, elbows and valves. See p. 284. Diamond Saws. J. Dickinson, 64 Nassau St., N. Y. Steam Hammers, Improved Hydraulic Jacks, and Tube Expanders. R. Dudgeon, 24 Columbia St., New York. Wanted--The address of 40,000 Sawyers and Lumbermen for a copy of Emerson's Hand Book of Saws. New edition 1880. Over 100 illustrations and pages of valuable information. Emerson, Smith & Co., Beaver Falls, Pa. Eagle Anvils, 10 cents per pound. Fully warranted. For Wood-Working Machinery, see illus. adv. p. 413. Eclipse Portable Engine. See illustrated adv., p. 413. Tight and Slack Barrel machinery a specialty. John Greenwood & Co., Rochester, N. Y. See illus. adv. p. 413. Elevators, Freight and Passenger, Shafting, Pulleys and Hangers. L. S. Graves & Son, Rochester, N. Y.