. 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 III. DRAINING BOGS. 696 the wetness from both. But where the impervious stratum dips or declines more to one side of
. 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 III. DRAINING BOGS. 696 the wetness from both. But where the impervious stratum dips or declines more to one side of the hill or elevation than the other, the water will be directed to the more de- pressed side of that stratum; the effect of which will be, that one side of such rising ground will be wet and spongy, while the other is quite free from wetness. 4236. Where water usites forth on the surface at more places than one, it is necessary to detennine which is the real or principal spring, and tliat from which the other outlets are fed; as by removing the source, the others must of course be rendered dry. When on the declivity or slanting surface of the elevated ground from which the springs break forth, they are observed to burst out at different levels according to the difference of the wetness of the season, and where those that are the lowest down continue to run, while the higher ones are dry, it is, in general, a certain indication that the whole are connected, and proceed from the same source ; and consequently that the line of the drain should be made along the level of the lowermost one, which, if properly executed, must keep all the others dry. But if the drain were made along the line of the highest of the outlets, or places where the water breaks forth, without being sufficiently deep to reach the level of those below, the overflowings of the spring would merely be carried away, and the wetness proceeding from that cause be removed ; while the main spring, still continuing
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Keywords: ., bookcentury1800, bookpublisherlondonprin, booksubjectagriculture
