. The book of the farm : detailing the labors of the farmer, steward, plowman, hedger, cattle-man, shepherd, field-worker, and dairymaid. Agriculture. 284 THE BOOK OF THE FARM WINTER. 126, fall in, from below the line of transmit upward as shown by the the lines from d to m. in fig dotted linos at d\ a'. //, 11. (620.) Other modifications may, if required by peculiar taste or otherwise, be given to this form of mould board. If after tlvc points bptim. &c. have been determined tipon the cylin- drical surface, fiir. 12:?, or 12.'), and, in cutting away the jiarts above ab in the latter fi^'u
. The book of the farm : detailing the labors of the farmer, steward, plowman, hedger, cattle-man, shepherd, field-worker, and dairymaid. Agriculture. 284 THE BOOK OF THE FARM WINTER. 126, fall in, from below the line of transmit upward as shown by the the lines from d to m. in fig dotted linos at d\ a'. //, 11. (620.) Other modifications may, if required by peculiar taste or otherwise, be given to this form of mould board. If after tlvc points bptim. &c. have been determined tipon the cylin- drical surface, fiir. 12:?, or 12.'), and, in cutting away the jiarts above ab in the latter fi^'ure, instead of reduciiiff the surfac-e to the straight lines 8'/>, f' u. 7' in, tScc. we leave the surfuee slightly convex ujion all these lines, a surface will be produced as represented by the dotted sectional lines of fisr. 126, or 128. and by becoming slightly either recurved above the line of transit, as in fis. 128, or with continued "convexity, as in fig. 118, Plate XI., the .surface so pro- duced would deliver the slice witliout risk of injury to the edge; which, though not of vital importance, is jilways an object in the estimation of the plowman who performs his work with taste. The same modification w ould also, in the opinion of many agricultural machine makers, render the mould-board niorc elKcacious in the working of stiti" clay soils, (621.) Fig. 127, Plate repres«'nts an elevation of the new mould board, as now constructed by me. and fig. 128 the analytical sections of the same, taken in the same maimer as described for those precedinL', and having the same letters of reference. In the present case, the sec- tional lines are all .-traight to the bight of the line of transit; above that line and before the zero they are slightly concave, though, as has been shown, this is not imperative: but, behind the zero, they are convex from a little below the line of transit, as shown by the dotted portions of the lines. The paralleloi-'ram k 1/, being a
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Keywords: ., bookcentury1800, bookdecade1850, booksubjectagriculture, bookyear
