ESTABLISHED 1820. WILLIAM J. YOUNG & SONS, MATHEMATICAL AND ENGINEERING INSTRUMENT MANUFACTURERS. No. 43 North Seventh St., PHILADELPHIA. IMPROVED TRANSITS and LEVELS, TAPES, CHAINS, DRAUGHTING INSTRUMENTS. STATIONERY, ALL SUPPLIES FOR Field and Office. T. B. BICKERTON & CO. Railroad, Machinists' & Engineers' SUPPLIES. No. 12 SOUTH FOURTH STREET, PHILADELPHIA. Morris, Tasker & Co....... ......Philadelphia, Pa............ See Page 168 Lewis Oliver & Phillips; H. B. Newhall, Agt...New York..... ...See Page 166 118 66 166 Ladles. Lag Screws. MEMORANDA ON ENGLISH RAILWAYS-CONTINUED. Requirements. Joints of rails to be fished. Chairs to be secured by iron spikes. Fang bolts to be used at the joints of flat-bottomed rails. Stations. Ends of platforms to be ramped (not stepped). Signals and distant signals in both directions. Signals to be weighted to fly to "danger" if wire breaks. Facing points to be avoided where unavoidable, to be furnished with self-acting signal. Sidings to be supplied with locked chock-block. Sidings on a gradient falling towards the line to be provided with a blind siding. Turn-tables to be a safe distance from adjacent lines. Platforms of bridges protected from fire. Walls and handrails to be provided on viaducts at stations. Level crossing gates to be capable of being closed across both road and railway. Melt the shellac at the lowest necessary temperature; stir the previously warmed; and then add the colors, and pour into moulds turpentine Skinner & Gifford Manf'g Co. Office and Works, Cor. Talcott St. & Railroad Avenue, DUNKIRK, NEW YORK, MANUFACTURERS OF Self-Acting Hoisting Machines, FOR LOCOMOTIVES AND CARS. HAND, PUSH AND DUMP CARS, Portable and Stationary. WRECKING DERRICKS, WATER TANK VALVES, Railway and Contractors' Track Supplies, Frogs, Switches, Steel Scrapers, Cold Chisels, Claw and Tamping Bars, Spike Mauls, Bridge Bolts and Castings---All Sizes. DESIGNS AND ESTIMATES FOR Iron Roof Trusses and Cast Iron Fronts, FOR ROUND HOUSES and DEPOTS, Furnished on Application. Send for Illustrated Catalogue and Price List. 3/8-in. 138 14 137 119 2 15/8 138 1% 2 .... 11 11 8 8 12/ 13 17 16 16 14 16 16 1 11 152 138 177 2 NUMBER OF NUTS OF EACH SIZE TO 100 POUNDS. COLD PUNCHED NUTS. HOT PRESSED NUTS. 13 11 13 154 111 118 1/18 1 13% 2 14 16 2 118 STANDARD LIGHT SIZES, HOT PRESSED, SQUARE AND HEXAGON NUTS. Hexagon. Square. Hexagon. 12-in. 109) 1240 810 5 540 645 8 450 370 420 265 225 253 THE PRATT & WHITNEY CO., HARTFORD, CONN., MANUFACTURERS OF Engine Lathes, with Slate's Patent Taper Attachment. Boring Mills, Shaping Machines, Planers, Drills, AND OTHER Machinists' Tools, Gun and Sewing Machine Machinery, Friction Clutch Pulleys, &c. SEND FOR DESCRIPTIVE PAMPHLET. NEW HAVEN NUT CO. One Steamer, fitted for Horses, Prince's Metal Jacket, very powerful and highly finished. One Steamer, fitted for Horses, Sheet Iron Jacket. One Single Pump Steamer, drawn by Hand, Sheet Iron Jacket. **All built by The Allerton Iron Works Manufacturing Co., and will be sold at very low prices. ADDRESS GEORGE M. ALLERTON, 205 BROADWAY, NEW YORK. |