. Charles V. Mapes'. Agricultural machinery. The Share is made of cast iron, or wrought iron steel-edged, or wholly of steel. If of cast iron, the entire cutting edge and the point, is hardened in casting, by a process of chilling, which forms a very hard surface, the effect of which is constantly to produce a sharp thin cutting edge, of great advantage in plowing; and to insure three times the service in the Fig. 92. The Share. gi^^re that would otherwise be obtained. The extent of the case-hardening is indicated in Fig. 92, by the dotted line back of the edge of the share. Fig. 93 represents
. Charles V. Mapes'. Agricultural machinery. The Share is made of cast iron, or wrought iron steel-edged, or wholly of steel. If of cast iron, the entire cutting edge and the point, is hardened in casting, by a process of chilling, which forms a very hard surface, the effect of which is constantly to produce a sharp thin cutting edge, of great advantage in plowing; and to insure three times the service in the Fig. 92. The Share. gi^^re that would otherwise be obtained. The extent of the case-hardening is indicated in Fig. 92, by the dotted line back of the edge of the share. Fig. 93 represents the Fin Share. A share like that represented in Fig. 92 is cast with the addition of the fin, and is termed the Fin Share. It is a useful addition for plowing sod lands infested with roots and stumps or stones, where the sward cutter cannot be used without danger of getting bent or mis- placed. It is also useful when plowing-in stubble or coarse manure, serving to keep the Fig. 93. The Fin Share. plow from clogging at the standard. It sep- arates the furrow-slice from the unplowed land more smoothly and easily than it could be done by the breast of the plow. The Dial Clevis. In order to obtain the same steady, easy and uniform mo- tion of the plow, running at diflPerent depths of furrow, the point of attaching the chain, or motive power, must be varied. For instance, if properly attached to work six inches deep, the chain at the end of the beam must be raised considera- bly to work well at twelve inches deep, and carried to the right in order to acquire more width of furrow-slice, and in proportion for the intermediate depths; with the common clevis suflBcient variations cannot be had. The manufacturers of the Eagle Plows use for the purpose the Scotch clevis, or the patent dial clevis; the latter is represented by the cuts below in detached parts, and is seen attached on the preceding cuts. It is strong and instantly adjusted to any degree of nicety, and capable of greater va
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Keywords: ., bookcentury1800, bookdecade1860, booksubjectagricul, bookyear1861
