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" ... stone materials, the hardness of the former will be found to be greatly inferior to that of the latter, and the error of the advocates of smooth-looking gravel roads will be immediately made manifest. By referring to works of science, it will be seen... "
A Treatise on Mechanics: Intended as an Introduction to the Study of Natural ... - Page 152
by Bewick Bridge - 1814 - 228 pages
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A Treatise on Roads: Wherein the Principles on which Roads Should be Made ...

Sir Henry Parnell - Roads - 1833 - 474 pages
...By referring to works of science, it will be seen that hardness is defined to be that property of a body by which it resists the impression of other bodies...impression, then a body is said to be perfectly hard.* Now this hardness is the hardness which a road ought to have as far as it is practicable to produce...
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The Teacher's Assistant in the "Course of Mathematics Adapted to the Method ...

Mathematics - 1836 - 488 pages
...BODIES. Hardness is that property a of body by which it resists the impression of other bodies that impinge upon it ; and the degree of hardness is measured by the quantity of this resistance. If this resistance is so complete as to render it totally incapable of any impression, then a body is...
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A Treatise on Roads: Their History, Character, and Utility; Being the ...

Simeon DeWitt Bloodgood - Highway law - 1838 - 252 pages
...By referring to works of science, it will be seen that hardness is denned to be that property of a body by which it resists the impression of other bodies...impression, then a body is said to be perfectly hard. Now this hardness is the hardness which a road ought to have as far as it is practicable to produce...
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A Treatise on Roads: Wherein the Principles on which Roads Should be Made ...

Sir Henry Parnell - 1838 - 512 pages
...By referring to works of science, it will be seen that hardness is defined to be that property of a body by which it resists the impression of other bodies...impression, then a body is said to be perfectly hard.* Now this hardness is the hardness which a road ought to have as far as is practicable, and it is the...
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A Manual of the Principles and Practice of Road-making: ...and Rail-roads

William Mitchell Gillespie - 1852 - 400 pages
...deepening the hole and thus increasing the force of the next blow. Hardness is that property of a surface by which it resists the impression of other bodies which impinge upon it. It is essential to the preservation of smoothness, except in the case of elastic surfaces. RESISTANCES...
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