. 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. s it with such large broad stones as he can procure, from fifteen inches in length totwo feet, being the utmost width of the drain itself. These are handed down carefullyto him by his attendant; and, after he has laid three or four of them, he takes smallerflat stones, as the larger are always uneven at the edges, and covers every interstice ; andaf
. 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. s it with such large broad stones as he can procure, from fifteen inches in length totwo feet, being the utmost width of the drain itself. These are handed down carefullyto him by his attendant; and, after he has laid three or four of them, he takes smallerflat stones, as the larger are always uneven at the edges, and covers every interstice ; andafterwards, with similar stones, packs carefully the ends of the covers, before finishinganv particular portion of the work so as to prevent them from shifting ; and still furtherto cover every hole through which any thing might be carried into the conduit, he hasa rolled up wisp of straw which he puts in the mouth of the conduit, which allows thewater to pass out, but prevents mud and sand from getting in. His attendant thenthrows the remainder of the stones in promiscuously to the depth of two feet, or some-times more, if the materials are plentiful, and particularly where there are two reams con- Book III. DRAINING RETENTIVE SOILS. 703 637. taining water; for in this case it is gene-rally desirable to raise the stones above thelevel of the bottom of the upper seam, soas to convey away any water which mayremain in it, to the conduit beneath(Jig. 637. a, sand or gravel ; b, clay) ;ard it was a circumstance very generallyobserved in the course of operations, thatwhere the upper stratum containing waterwas only a few feet in depth or thickness,another open stratum was generally founda few feet deeper. 4265. Stones. When the stones to be used are only brought forward at the time ofcutting the drain, the carts are often run back to the edge of it, and the stones, after theconduit is built, tumbled straight out of the cart into the drain ; but, in this case, it isnecessary to take c
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Keywords: ., bookcentury1800, bookdecade1870, bookpublisherlondo, bookyear1871
