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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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 . 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 ...
... tractive power at all . 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 ...
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 ...
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 - 1833 |
A Treatise on Roads: Wherein the Principles on which Roads Should be Made ... Sir Henry Parnell Visualização integral - 1838 |
Palavras e frases frequentes
2d Edition abutments acclivity Allesley arch axle bottom breadth bridge broken stones built carriage centre cloth coach coating commissioners considerable constructed contractor Coventry cross drains depôts depth draught drawing earth eighteen inches elasticity embankments engineer Engravings expense experiments fences foot footpath formed Foster's Booth foundation four inches gravel half hard Hartshill hill hind Holyhead Road horizontal horses improvement inches deep inches thick inches wide J. C. LOUDON John Kershaw labour laid length line of road London masonry materials ment miles necessary nine inches North Wales paved pavement placed Plate posts principle proper quicksets Rates of Inclination repair road-making roadway side channels side springs six inches slopes spirit level Stowe Hill surface surveyor Telford Thomas Baylis three inches tractive TREATISE trustees turnpike roads turnpike trusts velocity Vignette Titles vols waggon weight wheels whole wing walls Woodcuts yards
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