. An encyclopædia of agriculture : comprising the theory and practice of the valuation, transfer, laying out, improvement, and management of landed property, and of the cultivation and economy of the animal and vegetable productions of agriculture. ose these twotons to be distributed into forty wheelbarrows, of one hundred weight each, and theywere to pass over over it succession, the only effect likely to be produced would be atrirling rounding of its corners ; nor would probably five hundred such wheelbarrows,of twenty-five tons, crush the stone so completely as the single waggon-wheel. Nor
. An encyclopædia of agriculture : comprising the theory and practice of the valuation, transfer, laying out, improvement, and management of landed property, and of the cultivation and economy of the animal and vegetable productions of agriculture. ose these twotons to be distributed into forty wheelbarrows, of one hundred weight each, and theywere to pass over over it succession, the only effect likely to be produced would be atrirling rounding of its corners ; nor would probably five hundred such wheelbarrows,of twenty-five tons, crush the stone so completely as the single waggon-wheel. Nor do Ithink that five hundred gig or one-horse chaise wheels, of four hundred weight each, inall one hundred tons, would so completely destroy the cohesion of the stone, as the singlecrush of the heavy wheel. Conceiving, therefore, that the destructive effect of pressureon the roads increases, from the lowest weights to the highest, in a very rapidly increasingratio, I think that all reasonable ingenuity should be exercised, so to construct our car-riages, as for each wheel to press the road with the least possible weight that the publicconvenience will allow. 3740. A great weight in one rolling mass (Jig. 564.), Fry continues, has a tendency. to disturb the entire bed of the road, whether it be on a six-inch wheel or on one cfsixteen inches, and whether on conical (fig. 563. a) or on cylindrical wheels (fig. 563. b).Under all these considerations, I am satisfied that the only grand desideratum, on behalfboth of the roads and the horses, is light pressure; and therefore any dependenceon breadth of wheels, as a security against the destructive effects of pressure, is inmy opinion fallacious. I wish here to be understood as applying these remarks upon asupposition that wheels were made upon the most philosophical construction ; that is tosay, perfectly cylindrical (jig. 563. b); and that they stood perfectly upright or present system of broad wheels I consider a syste
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Keywords: ., bookcentury1800, bookdecade1870, bookpublisherlondo, bookyear1871
