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 páginas |
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Resultados 1-5 de 24
Página 26
... tractive power as much as possible , have all been wholly overlooked . The foreign scientific traveller must be asto- nished to find that a nation like England , which displays such an extent of science as regards its canals , docks ...
... tractive power as much as possible , have all been wholly overlooked . The foreign scientific traveller must be asto- nished to find that a nation like England , which displays such an extent of science as regards its canals , docks ...
Página 45
... tractive 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 ...
... tractive 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 ...
Página 57
... tractive power at all . An impulse given to a load at one end would carry it to the other by its inertia alone . This is the ideal limit to which it is the business of a road - maker to approximate as nearly as he can , all practical ...
... tractive power at all . An impulse given to a load at one end would carry it to the other by its inertia alone . This is the ideal limit to which it is the business of a road - maker to approximate as nearly as he can , all practical ...
Página 63
... tractive force would be continually pulling up a hill ; it would have the effect of a continual ascent . The surface of the road should be as hard and as unyielding as art can make it ; the wheel should not sink PRINCIPLES OF ROAD ...
... tractive force would be continually pulling up a hill ; it would have the effect of a continual ascent . The surface of the road should be as hard and as unyielding as art can make it ; the wheel should not sink PRINCIPLES OF ROAD ...
Página 64
... tractive power . This tractive power depends upon several qualities in the road ; first , upon its levelness ; secondly , upon the smoothness of its surface ; and thirdly , upon a quality which may be called hard- ness , the absence ...
... tractive power . This tractive power depends upon several qualities in the road ; first , upon its levelness ; secondly , upon the smoothness of its surface ; and thirdly , upon a quality which may be called hard- ness , the absence ...
Índice
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Outras edições - Ver tudo
A Treatise on Roads: Wherein the Principles on which Roads Should be Made ... Sir Henry Parnell Visualização integral - 1837 |
A Treatise on Roads: Wherein the Principles on which Roads Should be Made ... Sir Henry Parnell Visualização integral - 1838 |
A Treatise on Roads: Wherein the Principles on which Roads Should be Made ... Sir Henry Parnell Visualização integral - 1833 |
Palavras e frases frequentes
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
Passagens conhecidas
Página 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?