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 Road |
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Page 76
... horizontal , be- cause as gravity acts in a direction perpendicular to the plane of the horizon , it neither accelerates nor retards the motion . † But when the road is not horizontal , the power of gravity is a great impediment . A ...
... horizontal , be- cause as gravity acts in a direction perpendicular to the plane of the horizon , it neither accelerates nor retards the motion . † But when the road is not horizontal , the power of gravity is a great impediment . A ...
Page 80
... horizontal to one foot perpendi- cular ; for though several kinds of earth will stand at steeper inclinations , a slope of two to one is necessary for admitting the sun and wind to reach the road . The whole of the green sod and fertile ...
... horizontal to one foot perpendi- cular ; for though several kinds of earth will stand at steeper inclinations , a slope of two to one is necessary for admitting the sun and wind to reach the road . The whole of the green sod and fertile ...
Page 81
... horizontal to one perpen- dicular , in order to secure the great advantage of allowing the sun and wind to reach more freely the surface of the road . In districts of country where stones abound , expense in moving earth and purchasing ...
... horizontal to one perpen- dicular , in order to secure the great advantage of allowing the sun and wind to reach more freely the surface of the road . In districts of country where stones abound , expense in moving earth and purchasing ...
Page 85
... horizontal for one foot perpendicular . In cut- tings in chalk or chalk marl , the slopes will stand at one to one ... horizontal plane , is called the line of bearing of that stratum , or the drift - line . The dip , or inclination , of ...
... horizontal for one foot perpendicular . In cut- tings in chalk or chalk marl , the slopes will stand at one to one ... horizontal plane , is called the line of bearing of that stratum , or the drift - line . The dip , or inclination , of ...
Page 86
... horizontal , even though there should be thin layers of marl between the beds of stone , as in Plate II . fig . 8. , the slopes will stand at a quarter to one . But it will be necessary , if the beds of marl exceed twelve inches in ...
... horizontal , even though there should be thin layers of marl between the beds of stone , as in Plate II . fig . 8. , the slopes will stand at a quarter to one . But it will be necessary , if the beds of marl exceed twelve inches in ...
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Common terms and phrases
Allesley arch Archway road bottom breadth breast walls brick bridge broken stones built carriage centre coating Commissioners constructed contractor cross drains depôts depth district draught earth eighteen inches embankments engineer feet wide fences foot footpath formed Foster's Booth foundation four feet four inches gravel ground half Hartshill hill Holyhead Road horizontal horses improvement inches deep inches thick inches wide inclined plane J. C. LOUDON John Kershaw labour laid length line of road London masonry Menai Strait ment miles mortar necessary nine inches North Wales parish passing paved pavement pence placed Plate VII proper quicksets rails railway Rates of Inclination repair road materials road-making roadway side channels six inches sixteen inches slopes specification spirit level Stowe Hill streets surface surveyor Telford Thomas Baylis three feet three inches trustees turnpike roads valley velocity waggon weight wheels whole
Popular passages
Page 23 - 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?
Page 10 - All these cities were connected with each other, and with the capital, by the public highways, which, issuing from the Forum of Rome, traversed Italy, pervaded the provinces, and were terminated only by the frontiers of the empire. If we carefully trace the distance from the wall of Antoninus to Rome, and from thence to Jerusalem, it will be found that the great chain of communication, from the north-west to the south-east point of the empire, was drawn out to the length of four thousand and eighty...
Page 23 - A more dreadful road cannot be imagined. I was obliged to hire two men at one place to support my chaise from overturning. Let me persuade all travellers to avoid this terrible country, which must either dislocate their bones with broken pavements, or bury them in muddy sand.
Page 10 - The public roads were accurately divided by milestones, and ran in a direct line from one city to another, with very little respect for the obstacles either of nature or private property. Mountains were perforated, and bold arches thrown over the broadest and most rapid streams.
Page 291 - At many turnpikes, it has been said, the money levied is more than double of what is necessary for executing, in the completest manner, the work, which is often executed in a very slovenly manner, and sometimes not executed at all.