An encyclopædia of agriculture [electronic An encyclopædia of agriculture [electronic resource] : comprising the theory and practice of the valuation, transfer, laying out, improvement, and management of landed property, and the cultivation and economy of the animal and vegetable productions of agriculture, including all the latest improvements, a general history of agriculture in all countries, and a statistical view of its present state, with suggestions for its future progress in the British Isles encyclopdiaofa02loud Year: 1831 590 PRACTICE OF AGRICULTURE. Part III. the stone. Feeding the
An encyclopædia of agriculture [electronic An encyclopædia of agriculture [electronic resource] : comprising the theory and practice of the valuation, transfer, laying out, improvement, and management of landed property, and the cultivation and economy of the animal and vegetable productions of agriculture, including all the latest improvements, a general history of agriculture in all countries, and a statistical view of its present state, with suggestions for its future progress in the British Isles encyclopdiaofa02loud Year: 1831 590 PRACTICE OF AGRICULTURE. Part III. the stone. Feeding the mill was also found difficult and dangerous. Tiiis unsucccssfid attempt should not discourage mechanists from further trials. Stones previously broken to the size of five or six inches, might be thrown upon a strong circular liorizonfal grating, made of cast iron. The stones might be forced downwards through this grating by an iron rammer or a sledge; they would thus be broken to fragments that could not exceed a certain size, and that would not be reduced to powder. 3657. The manner of breaking, according to Telford, is of great importance. More depends, he says, on the weight, shape, and manner of using hammers, than any one can conceive who has not had much experience in road-making ; the difference in managing this operation being not less than ten per cent. ; and is, besides, of equal importance towards the perfection of the road. The size and weight of the hammer he would ap- portion to the size and weight of the stones ; and the stones should be broken upon the heap, not on the ground. It must be evident that using round stones, instead of broken ones, will be the means of deranging the position of those near them, and of grinding them to pieces. S658. According to M'Adam, the only method of breaking stones, both for effect and economy, is by persons sitting: the stones are to be placed in small heaps ; and women, boys, or old men past hard labour, must f'X '^ 541
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