. 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. Agriculture. Book IV. THRESHING MACHINES. 439 time down through a scarce or sparred rack into the hopper, which conveys it into the ta
. 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. Agriculture. Book IV. THRESHING MACHINES. 439 time down through a scarce or sparred rack into the hopper, which conveys it into the tanners. By the fanners the corn is separated from the chaff, the clean grain running out at the opening, and the chaff or any light refuse blowing out at the end by the rapid motion of the fans, which are driven by a band or rope from a sheeve placed upon the axle of the threshing-drum, and passing over the sheeve fixed upon the pivot of the fans. 2791. Meikle's threshing machine to be impelled by steam is the same arrangement of interior machinery, with a steam engine outside of the barn connected by a shaft in the manner of the wind and water machines. 2792. Portable threshing-machines, to be fixed in any barn, or in the open field, for threshing the crops of small farms, or for other purposes of convenience, are differently contrived. Except the hand machine, already described (§ 2546.), all of them work by horses, and generally by one, or at most two. The most complete have a large frame of separating beams, into which the gudgeons of the larger wheels work, and which retains the whole of the machinery in place. In general there are no fanners; but sometimes a winnowing machine is driven by a rope from the threshing machinery. Such machines are considerably more expensive, in proportion to their power, than fixed machines ; they are, therefore, not much used, and indeed their place might often be profitably supplied by the hand machine. Portable threshing machines are very
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Keywords: ., bookcentury1800, bookpublisherlondonprin, booksubjectagriculture
