. Book of the Farm; being a revised edition of The handy-book of husbandry, a guide to farmers. Agriculture. is then slipped along until only one-half of its length is under the tile. The next tile has its nose inserted in the unoccupied half of the collar, and one-half of its other collar is drawn forward to receive the next tile—and thus to the lower end of the drain. The trimming of the ends of the tile, and the perforations in the tiles of main drains to admit the laterals, are made with a pick (Fig. 39). To make a hole in the tile, use the pointed end of the pick, chipping around the circ
. Book of the Farm; being a revised edition of The handy-book of husbandry, a guide to farmers. Agriculture. is then slipped along until only one-half of its length is under the tile. The next tile has its nose inserted in the unoccupied half of the collar, and one-half of its other collar is drawn forward to receive the next tile—and thus to the lower end of the drain. The trimming of the ends of the tile, and the perforations in the tiles of main drains to admit the laterals, are made with a pick (Fig. 39). To make a hole in the tile, use the pointed end of the pick, chipping around the circumference of the hole until the center-place falls in. Collecting drains should be laid a little deeper than the mouths ot the laterals which discharge into them, (allowance for this having been made in the original grading,) that these may be admitted at the top of the main. When the lateral Fig. 40.—Lateral Drain entering at Top. and the main are of cqual size, the best way to make the connection is to substitute a long pipe in place of the collar, making a hole at the top of this, to admit the lateral, as shown in Figs. 40 and 41. Silt Basins.—In new drains there is always some earthy matter (silt) in the water which flows through the pipe,—the looser earth about the joints is carried in, in small quantities, dur- ing the early action of the drain. If the fall of the drain is irregular this silt may be carried in suspension in the water, where the current is rapid, and deposited ^M# in the depressions, or more level parts, where the flow is sluggish, and cause the obstruction of the drain, which is thereby rendered ^.vw"S)^t;,;;^^k^-<s».vx^ worthless. In ordinary soils, the amount of silt entering at the joints of the drain, will, if the fall be regular, cause no inconvenience, being either all carried out at the mouth of the drain, or deposited throughout its whole length to a depth so slight as to be of little or no consequence. If, on the other hand, it b
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Keywords: ., bookcentury1800, bookdecade1870, bookpubl, booksubjectagriculture
