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adopted American amount angle boiler bottom bridge building built Canada canal cantilever carried cars cast cement cent centre close coal column complete connected considerable considered construction continuous cost course cross deflection depth designed diameter direct distance effect electric engine England equal erecting experience fact feet floor four girders give given greater important inch increased interest iron joint lead length less light load locomotive machine material matter means mentioned method miles moved necessary obtained operation ordinary Panama pass pipe placed plates position practice present pressure question rails railway referred repairs river road roof running side single Society span steel strain stresses structure taken tion track varying weight wheels whole wide wire writer
Page 129 - ... the art of directing the great sources of power in nature for the use and convenience of man, as the means of production and of traffic in states.
Page 14 - This expenditure comprises the following items : — Rails for a double way from Liverpool to Manchester, with occasional lines of communication, and additional side lines at the different Depots, being about 35 miles of double way, = 3847 tons, at prices averaging something less than £12.
Page 111 - ... have been necessary but for the swivelling truck. The swivelling truck was first suggested by Horatio Allen, for the South Carolina Railway, in 1831 ; but the first practical use of it was made on the Mohawk and Hudson Railroad, in the same year. It is said to have been invented by John B. Jervis, Chief Engineer of that road. The next improvement was the invention of the equalizing beams or levers, by which the weight of the engine is always borne by three out of four or more driving-wheels....
Page 239 - ... sharp. But, with rigid plates, the injury is apparently serious, the plates being weakened 15 to 30 per cent. The injury is due, not to cracks formed in the plate, but to the pressure straining it beyond its limit of elasticity, and thus altering its homogeneous character and power of equal elongation under strain.
Page 25 - The President, or in his absence one of the VicePresidents, shall preside at all meetings of the Association and its Board of Directors, and perform the ordinary functions of the presiding officer.
Page 218 - Where any aerial conductor is erected so as to cross any other aerial conductor or any suspended wire used for purposes other than the supply of energy, precautions shall be taken by the owners of such crossing...
Page 218 - Ib. per square foot. No addition need be made for a possible accumulation of snow. Every support, if of metal, shall be efficiently connected with earth.
Page 247 - ... surprised to find, not only a continued diminution of the value of one division, but a well defined shifting of the zero of the level. By noon I had nearly completed the examination for the first half of the divisions. I then opened the shutters for an observation of the sun. After an interval of ten minutes, observations with the level were resumed when it was found that the value of one division, determined, from the same space as before, had increased by one-fourth of its mean value. It will...
Page 124 - ... were made with easy grades and gentle curves. Monumental bridges, lofty stone viaducts, and deep cuts or tunnels at every hill marked this stage of railway construction in England, which was imitated on the European lines. As it was with the railway, so it was with the locomotive. The Stephenson type, once fixed, has remained unchanged (in Europe), except in detail, to the present day. European locomotives have increased in weight and power, and in perfection of material and workmanship, but...
Page 218 - T^,th of an ampere in the case of alternating currents. Every such circuit containing high-pressure conductors shall be fitted with an indicating device which shall continuously indicate if the insulation resistance of either conductor fall below the conditions required by this regulation.