. Book of the Farm; being a revised edition of The handy-book of husbandry, a guide to farmers. Agriculture. DRAINAGE. 110 interrupted, and set on at an acute angle, so that the force of the stream flowinu: from the lateral drain adds to the velocitv of the current in the main, entirely obviates this difficulty, which was one of the greatest connected with the old style of work, and makes the drainage of land even less uncertain than before. Among the minor improvements made by Mr. Boynton, the Bend, (Fig. 50, quarter bend, ^ig- 5°- Fig j, and Fig. 51, one-eighth bend,) for turning corners in
. Book of the Farm; being a revised edition of The handy-book of husbandry, a guide to farmers. Agriculture. DRAINAGE. 110 interrupted, and set on at an acute angle, so that the force of the stream flowinu: from the lateral drain adds to the velocitv of the current in the main, entirely obviates this difficulty, which was one of the greatest connected with the old style of work, and makes the drainage of land even less uncertain than before. Among the minor improvements made by Mr. Boynton, the Bend, (Fig. 50, quarter bend, ^ig- 5°- Fig j, and Fig. 51, one-eighth bend,) for turning corners in drains, allows the stream to change its course gradually and Quarter Bend. smoothlv, and with much less retarding effect, than with the angular turn which alone was possible in using straight tiles with beveled ends ; the reducing tile, fig. 52, enables 1 =â us to change from one size to another in a (^^ ^ straight drain without making an abrupt edge in the bore of the drain ; and the glazed outlet. Fig. 53. Fig. 53, with a grating to exclude vermin, makes an excellent and durable finish at the only point at which they first attack the work. LAND DRAINAGE DETAILS OF THE WORK. It is never pleasant to confess errors ; but I am convinced, by what I have recently seen, that, in previous writing about drain- age, I have been mistaken on one point. That is, in insisting, as a universal rule, that the whole line should be opened from the upper end of the lateral to the lower end of the main, and that the main should be kept open until the tile-laying and cover- ing should be finished in all its laterals. This is frequentlv, but not always, true,âperhaps it is not even generally so. I have probably directed the laving of over a hundred miles of tile drains, and I have always tried to approach as nearly as pos- sible to the English practice, as I had seen it described. I have bought sets of English draining-tools, and have read in English agricultural books and papers about the way
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