. 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. lly ought),tint the undertaker should the straightness of the channel, and uphold its banks dun up that or some Other time fixed upon ; anil to deliver them up, at the end of the term, in the state andcondition specified in the contract. __„...,., .,.• Sterling the course of a river is given in The Cvile of Agriculture. 1 lie waters,which in theircr
. 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. lly ought),tint the undertaker should the straightness of the channel, and uphold its banks dun up that or some Other time fixed upon ; anil to deliver them up, at the end of the term, in the state andcondition specified in the contract. __„...,., .,.• Sterling the course of a river is given in The Cvile of Agriculture. 1 lie waters,which in theircrooked course were formerly almost stagnated, now run at the ordinary rate of thedeclivity given them. Thej never overflow their banks. Cattle can now pasture upon those grounds inwinch they would formerly have been swamped. The surface of the water being now in general four,and sometimes six feet below that of the adjacent fields, this cut serves as a general drain to the wholevalley ; so that three hundred acres of meadow may be converted into arable land ; sixty acres of nio-smaybe improved into meadow; and five hundred acres of arable land are rendered of double theirformer value, (p. 319.) 11. Raising riven to a higher level. As 674. 9 rivers and streams may require to bedeepened for the purpose of drainage,so may their waters require to beraised for the purpose of irrigation,impelling machinery, or producingcascades or waterfalls for the purposeof ornament. Dams or wears forthis purpose should be constructedso as to form a segment of a circleacross the bed of the stream, with theconvex side pointing up the stream,and the ends abutting against a na-tural or artificial bank (Jig- 674.) Bythis construction, the force of thewater, however great, will be effectually resisted, and the structure remains secure. Thegreater the slope towards the upper side, the better, but the lower side should be nearlyperpendicular, that the water may fall over it without coming in contact w
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Keywords: ., bookcentury1800, bookdecade1870, bookpublisherlondo, bookyear1871
