58 FARM MACHINERY 



90. Reinforcements. A patch of steel is usually welded 

 upon the shin, the point of. the share, and the heel of the 

 landside. These parts are also made interchangeable so 

 new parts may be substituted when worn. 



91. Size.- -Walking plows are made to cut furrows 



FIG. 37 ROLLING CASTER AND ROLLING STATIONARY COULTERS, FIN 

 HANGING, KNEE, DOUBLE ENDER, AND KNIFE CUTTERS OR COULTERS 



from 8 to 18 inches. A plow cutting a 14-inch furrow is 

 considered a two-horse, and one cutting a 16- or an 18- 

 inch furrow a three-horse plow. 



92. The modern sulky plow. The name sulky plow is 

 used for all wheel plows, but applies more particularly to 

 single plows, while the name gang is given to double or 



