A Treatise on Roads: Wherein the Principles on which Roads Should be Made are Explained and Illustrated, by the Plans, Specifications, and Contracts Made Use of by Thomas Telford, Esq. on the Holyhead RoadLongman, Orme, Brown, Green, and Longmans, 1838 - 465 pàgines |
Des de l'interior del llibre
Resultats 1 - 5 de 52.
Pàgina 42
... increased . The experiments detailed in Mr. Telford's Seventh Report of the Parliamentary Commissioners of the Holyhead Road , made with a newly invented machine for measuring the force of traction re- quired to 42 A TREATISE ON ROADS .
... increased . The experiments detailed in Mr. Telford's Seventh Report of the Parliamentary Commissioners of the Holyhead Road , made with a newly invented machine for measuring the force of traction re- quired to 42 A TREATISE ON ROADS .
Pàgina 43
... force of traction re- quired to draw carriages over different roads , fully establish this fact . * The following is a table of the general results of the experiments made with a stage coach , on the same description of road ; but on ...
... force of traction re- quired to draw carriages over different roads , fully establish this fact . * The following is a table of the general results of the experiments made with a stage coach , on the same description of road ; but on ...
Pàgina 44
... Force required . 1 in 20 6 miles per hour 268 lbs . 1 in 26 1 in 30 1 in 40 1 in 600 6666 213 lbs . 165 lbs . 160 lbs . 111 lbs . 1 in 20 1 in 26 1 in 30 1 in 40 1 in 600 ∞∞∞∞∞ 8 miles per hour 296 lbs . 8 219 lbs . 8 196 lbs . 8 ...
... Force required . 1 in 20 6 miles per hour 268 lbs . 1 in 26 1 in 30 1 in 40 1 in 600 6666 213 lbs . 165 lbs . 160 lbs . 111 lbs . 1 in 20 1 in 26 1 in 30 1 in 40 1 in 600 ∞∞∞∞∞ 8 miles per hour 296 lbs . 8 219 lbs . 8 196 lbs . 8 ...
Pàgina 45
... force down- ward . Now , acclivities which are less steep than the angle of repose give a compensation in descend- ing for the excessive tractive force they require in ascending ; that is the case with acclivities between the perfect ...
... force down- ward . Now , acclivities which are less steep than the angle of repose give a compensation in descend- ing for the excessive tractive force they require in ascending ; that is the case with acclivities between the perfect ...
Pàgina 54
... avoid crossing parks , or demesnes , and , to a certain extent , no doubt it should ; but this mo- tive ought not to be allowed to have much weight , where the consequence is to force the road over an 54 A TREATISE ON ROADS .
... avoid crossing parks , or demesnes , and , to a certain extent , no doubt it should ; but this mo- tive ought not to be allowed to have much weight , where the consequence is to force the road over an 54 A TREATISE ON ROADS .
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Altres edicions - Mostra-ho tot
A Treatise on Roads: Wherein the Principles on which Roads Should be Made ... Sir Henry Parnell Visualització completa - 1837 |
A Treatise on Roads: Wherein the Principles on which Roads Should be Made ... Sir Henry Parnell Visualització completa - 1838 |
A Treatise on Roads: Wherein the Principles on which Roads Should be Made ... Sir Henry Parnell Visualització completa - 1833 |
Frases i termes més freqüents
Allesley arch Archway Road axles bottom breadth brick bridge broken stones built carriage centre coach coating commissioners constructed contract contractor Coventry cross drains DAVIES GILBERT depôts depth draught dynamometer earth eighteen inches elasticity embankments engineer expense experiments feet wide fences foot footpath fore wheels formed foundation four inches friction gravel ground half hard Hartshill height hill hind wheels Holyhead Road horizontal horses improvement inches deep inches thick inches wide instrument John Kershaw John Macneill labour laid length line of road manner masonry ment miles mortar mound necessary nine inches paved pavement placed Plate VII proper quicksets rails rates of inclination repair road-making roadway ruts side channels side springs six inches slopes specification spirit level springs square streets surface surveyor Telford theodolite Thomas Baylis three feet three inches trustees turnpike roads turnpike trusts upper velocity waggon whole wing walls
Passatges populars
Pàgina 20 - They will here meet with rutts which I actually measured four feet deep, and floating with mud only from a wet summer; what therefore must it be after a winter?