. The book of the farm : detailing the labors of the farmer, steward, plowman, hedger, cattle-man, shepherd, field-worker, and dairymaid. Agriculture. THE PLOW. 277 inches, then they'-'S +5 =CT2 iaches^g h or b k, being rather more than the best practical authorities tor cresting i)low s give to the depth of a slice ; the dimensions recommended bemg from 8| to 9 inches broad, and from ei to 6i inches in depth. It will therefore always fall short in perpendicular bight of the rectangular slice of 10 by 7 inches. But allowing the hight to be the same, we have two triangles, a be and g bh oi equa
. The book of the farm : detailing the labors of the farmer, steward, plowman, hedger, cattle-man, shepherd, field-worker, and dairymaid. Agriculture. THE PLOW. 277 inches, then they'-'S +5 =CT2 iaches^g h or b k, being rather more than the best practical authorities tor cresting i)low s give to the depth of a slice ; the dimensions recommended bemg from 8| to 9 inches broad, and from ei to 6i inches in depth. It will therefore always fall short in perpendicular bight of the rectangular slice of 10 by 7 inches. But allowing the hight to be the same, we have two triangles, a be and g bh oi equal hight but of unequal bases; their areas will therefore be une- qual and proportional to their bases. (588.) In bringing these two systems, however, into practice over any extent of surtace, suppose a ridge of a field, the nnmber oi furrows of each required to turn over such ridge, will be exactly in proportion to the length of the base of the triangle, or as 9 to 10. Hence, though the individual crested slices or triangles an area less than that of the rectangular slice in the proportion of 9 to 10 ; yet the aggregate area of all the triangles over any given breadth of surface, wher- ever the number of slices of the one exceeds that of the other in the proportion of 10 to 9, will be the same, but no more. The imaginary advantage, therefore, of a greater cover to the seed with a crested furrow falls to the ground, provided the comparison is made with a plow that takes a furrow of 10 inches wide by 7 inches deep, such as the East-Lothian plovr. (589.) It is to be admitted that, were cresting plows that cut their slices 9 inches wide, to take them 7 inches deep, and still preserve the rhomboidal or trapezoidal section, they might, in that case, produce an increase of cover to the seed, as compared with a rectangular slice of 9 by 7 inches. Let us refer again to the last figure, fig. 107, and suppose sr b=l inches, g /"being, as be- fore, i\ inches, then g h"^—g
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Keywords: ., bookcentury1800, bookdecade1850, booksubjectagriculture, bookyear
