| 1820 - Страниц: 534
...large stones when the road is broken up, and for keeping the road smooth after being relaid, and whils it is consolidating. Very light broad-mouthed shovels,...that cannot be affected by vicissitudes of weather or diplaced by the action of wheels, which will pass over it without a jolt, and consequently without... | |
| William Newton, Charles Frederick Partington - 1820 - Страниц: 538
...road is broken up, and for keeping the road smooth after being relaid, and while it i» consolidatiug. Very light broad-mouthed shovels, to spread the broken...that cannot be affected by vicissitudes of weather or diplaced by the action of wheels, which will pass over it without a jolt, and consequently without... | |
| 1820 - Страниц: 632
...applies to all materials universally. Round gravel and round pebbles never make a tolerable road : but broken stone will combine by its own angles into a smooth solid surface, that cannot be affected by the vicissitudes of weather.' But though all our authorities agree in the necessity of forming the... | |
| Pennsylvania Society for the Promotion of Internal Improvements in the Commonwealth - 1833 - Страниц: 16
...pretence of binding. Broken stone will combine by its own angles into a smooth, solid surface, which cannot be affected by vicissitudes of weather, or...it without a jolt, and consequently without injury. 11. "A carriage ought as much as possible to stand upright in travelling. I have generally made roads... | |
| 1834 - Страниц: 434
...pretence of binding. Broken stone will combine by its own angles into a -щи. ril,, solid surface, which cannot be affected by vicissitudes of weather, or...without a jolt, and consequently without injury." Again, Sir, in hi» communication lo the President of the Bocrd of Agri . culture i>f England, he says,... | |
| William Mitchell Gillespie - 1852 - Страниц: 400
...evil. He adds that nothing must be laid on the clean stone under the pretence of " binding ;" for clean broken stone will combine by its own angles into a smooth solid surface, which cannot be affected by vicissitudes of weather, nor displaced by the action of wheels. The French... | |
| Colin MacKenzie - 1853 - Страниц: 498
...will imbibe water and be affected with frost; nothing is to be laid oil the clean stone on Tn-etence of binding; broken stone will combine by its own angles...it without a jolt, and consequently without Injury. flint makes an excellent road, if due ittention be paid to the size; but, from want of that attention,... | |
| John Loudon McAdam - 1863 - Страниц: 100
...pound weight in the head, the face the size of a new shilling, well steeled, with a short handle. Rakes with wooden heads, ten inches in length, and iron...without a jolt, and consequently without injury.* During the late winter, and particularly in the month of January, 1820, when the frost was succeeded... | |
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