A practical treatise on the construction and formation of railways1848 - 80 Seiten |
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A Practical Treatise on the Construction and Formation of Railways James Day Keine Leseprobe verfügbar - 2019 |
A Practical Treatise on the Construction and Formation of Railways James Day Keine Leseprobe verfügbar - 2023 |
A Practical Treatise on the Construction and Formation of Railways James Day Keine Leseprobe verfügbar - 2019 |
Häufige Begriffe und Wortgruppen
18 feet 27 feet 30 feet arches ASCENT OF PLANE ballast barrow BATTER OF SLOPES blocks bottom breadth Ft Breadths at Formation-Level bricks canal cause Central Foot Cutting centre chair cubic yards Culverts decimals Depths of BATTER Depths of Breadths descending planes distance drains draw drawn one mile earth drawn earthwork Edge Rails edge-rails embankment empty wagons Engines excavation expense feet per mile fence Foot in breadth Foot in Cutting force of 150 formed friction gravity of plane gross load guage gullet hedge horse inches per chain INCLINATIONS OF ASCENDING iron kind laid layers length lime longitudinal timbers malleable malleable-iron rails masonry material mile per day mortar permanent road Plane ascending planted pressure proper quantity Railway ratio recurring decimal shafts side six inches sleepers soil stone thickness tons total resistance tractive force tractive power underneath weight drawn wheels whilst
Beliebte Passagen
Seite 11 - The manner of the carriage is by laying rails of timber from the colliery down to the river, exactly straight and parallel; and bulky carts are made with four rowlets fitting these rails ; whereby the carriage is so easy that one horse will draw down four or five chaldron of coals, and is an immense benefit to the coal merchants.
Seite 10 - ... and thicknesse of the coale, rare engines to draw water out of the pits, waggons with one horse, to carry down coales from the pits, to the stathes...
Seite 14 - I need not take time to relate,) the price of pigs became very low, and their works being of great extent, in order to keep the furnaces on, they thought it would be the best means of stocking their pigs, to lay them on the wooden railways, as it would help to pay the interest by reducing the repairs of the rails ; and if iron should take any sudden rise, there was nothing to do but to take them up, and send them away as pigs.
Seite 8 - A level way was covered with a broad platform of strong and solid planks; and to render them more slippery and smooth, they were anointed with the fat of sheep and oxen. Fourscore light galleys and brigantines of fifty and thirty oars were disembarked on the Bosphorus shore, arranged successively on rollers, and drawn forwards by the power of men and pulleys.
Seite 6 - ... road was raised into a terrace. " In mountainous districts, the roads were alternately cut through mountains and raised above the valleys, so as to preserve either a level line or a uniform inclination. They founded the road on piles where the ground was not solid, and raised it by strong side walls, or by arches and piers where it was necessary to gain elevation. The paved part of the great military roads was sixteen Roman feet wide, with two side ways, each eight feet wide, separated from the...
Seite 129 - The malleable iron rails are more constant and regular in their decay, by the contact and pressure of the wheel ; but they will, on the whole, last longer than cast-iron rails. It has been said by some engineers, that the wrought-iron exfoliate, or separate in their lamina:, on that part which is exposed to the pressure of the wheel.
Seite 11 - ... requires. There are afterwards arranged, along the whole breadth of this excavation, pieces of oak wood, of the thickness of four, five, six, and even eight inches square : these are placed across, and at the distance of two or three feet from each other ; these pieces need only be squared at their...
Seite 6 - Roman roads," says Mr. Tredgold, " ran nearly in direct lines ; natural obstructions were removed or overcome by the effort of labour or art, whether they consisted of marshes, lakes, rivers, or mountains. In flat districts, the middle part of the road was raised into a terrace. " In mountainous districts, the roads were alternately cut through mountains and raised above the valleys, so as to preserve either a level line or a uniform inclination. They founded the road on piles where the ground was...