A Practical Treatise on Rail-roads, and Interior Communication in General: With Original Experiments, and Tables of the Comparative Value of Canals and Rail-roads ... |
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Page 14
... placed upon them . Some ambiguity having arisen , respect- ing the law of resistance of carriages moved at different velocities upon Rail- roads , I have attempted , by a compre- hensive and minute illustration , assisted by diagrams ...
... placed upon them . Some ambiguity having arisen , respect- ing the law of resistance of carriages moved at different velocities upon Rail- roads , I have attempted , by a compre- hensive and minute illustration , assisted by diagrams ...
Page 24
... placed upon the most elevated parts of the country , for the purpose of watching the motions of the enemy , these roads invariably avoid the more level parts of the country , and stretch from hill to hill . For many centuries after the ...
... placed upon the most elevated parts of the country , for the purpose of watching the motions of the enemy , these roads invariably avoid the more level parts of the country , and stretch from hill to hill . For many centuries after the ...
Page 25
... placed upon a square frame of wood , which was dragged along by the horse , and when the goods were very bulky the united effort of several horses could be then employed , which could not be done when it was laid upon their backs . It ...
... placed upon a square frame of wood , which was dragged along by the horse , and when the goods were very bulky the united effort of several horses could be then employed , which could not be done when it was laid upon their backs . It ...
Page 37
... placed across , and at the distance of two or three feet from each other ; these pieces need only be squared at ... placed on each side of the road , along its whole length ; they are com- monly placed at four feet distance from each ...
... placed across , and at the distance of two or three feet from each other ; these pieces need only be squared at ... placed on each side of the road , along its whole length ; they are com- monly placed at four feet distance from each ...
Page 40
... placed upon the other , and firmly bound down by the pins or pegs of wood . This combination had many very obvious advantages over the single rail , for , independent of the waste of timber before described , the destruction of the ...
... placed upon the other , and firmly bound down by the pins or pegs of wood . This combination had many very obvious advantages over the single rail , for , independent of the waste of timber before described , the destruction of the ...
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Common terms and phrases
action adhesion amount application ascending carriages ascer ascertain bearing body boiler Calculated space canal carriages moved case-hardened cast-iron rails cause chain chair coals cog-wheels colliery connecting rod considerable conveyance conveyed crank cylinder declivities deflexion descending train distance Ditto drag the rope drawing dynamometer edge-rail effect employed equal experiments fastened feet fixed friction or resistance gravitating force gravity greater groove horses inches broad inches diameter inclined plane iron rails Killingworth kind level plane lever line of road loaded carriages loco-motive engine malleable iron malleable iron-rails metal miles an hour mode motive power moving power Newcastle-upon-Tyne patent performance periphery piston placed Plate preponderance present pressure produced progressive motion proper quantity Rail-road Rail-ways ratio riages roller rubbing surface self-acting planes sheeves shew side similar sleepers sliding space passed square steam steam-engine stone tion train of carriages traversed velocity waggons weight wooden wrought-iron Wylam
Popular passages
Page 36 - 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.
Page 124 - My attention was first directed in the year 1759 to the subject of steam-engines, by the late Dr Robison, then a student in the University of Glasgow, and nearly of my own age. He at that time threw out an idea of applying the power of the steam-engine to the moving of wheel-carriages, and to other purposes, but the scheme was not matured, and was soon abandoned on his going abroad.
Page 290 - It is far from my wish to promulgate to the world that the ridiculous expectations, or rather professions, of the enthusiastic speculist will be realised, and that we shall see engines travelling at the rate of twelve, sixteen, eighteen, or twenty miles an hour. Nothing could do more harm towards their general adoption and improvement than the promulgation of such nonsense.
Page 69 - ... to any important extent. I am inclined to think that this effect is prevented on the bearing surfaces of much used railways, by the pressure upon them. To account for their extraordinary freedom from rust, it is almost necessary to suppose, that some diminution takes place in the chemical affinity of the iron for the oxygen or carbonic acid. The continual smoothness in which they are kept, by the contact of the wheels, has the usual effect of polish, in presenting to the destroying influence...
Page 7 - ... shows very plainly that the spirits, or some of them at least, know just where the proofs of the truth of their testimony may be found by mortals, and gives us reason to hope, if not to expect, that some day the truth in relation to all these ancient matters will become known to the world generally. In order that the reader may be able to judge of the probable correctness of this very positive statement of the spirit of Chrysostom, I cite the following in relation to the Ambrosian library from...
Page 141 - This endless chain, which is now solely used upon these kind of engines, consisted at first of one broad and two narrow links, alternately, fastened together at the ends with bolts ; the two narrow links were always on the outside of the broad link ; consequently, the distance they were separated laterally would be equal to the breadth of the broad link, which was generally about two inches, and their length three inches. The periphery of the wheels, fixed upon the axles of the engine...
Page 35 - As the art to boore with, iron rodds to try the deepnesse 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, to the River, &c. Within few years, he consumed all his money, and rode home upon his light horse.
Page 142 - When the wheel turned round, these projecting cogs entered between the two narrow links, having a broad link between every two cogs, resting on the rim of the wheel; these cogs, or projections, caused the chain to move round with the wheel, and completely prevented it from slipping round upon the rim. When, therefore, this chain was laid upon the two toothed wheels, one wheel could not be moved round without the other moving round with it; and thus secured the proper angles to the two cranks.
Page 35 - Master Beaumont, a gentleman of great ingenuity, and rare parts, adventured into our mines with his thirty thousand pounds ; who brought with him many rare engines...
Page 132 - Upon the reciprocating line ac is fixed at 1, a rod, 1, 2, 3, sliding horizontally backwards and forwards upon the top of the boiler; from 2 to 3 it is furnished with teeth, which work into a cog-wheel, lying horizontally; on the opposite side of this cog-wheel a sliding rack is fixed, similar to 1, 2, 3, which, as the cog-wheel is turned round by the sliding rack, 2, 3 is also moved backwards and forwards. The end of this sliding rod is fixed upon the reciprocating lever d c, of the leg d «, at...