TILLAGE MACHINERY 65 



97. The chilled plow. In many places, especially in 

 the eastern United States, many of the plows used are of 



chilled cast iron. A chilled plow with an interchangeable 



FIG. 43 A MODERN CHILLED WALKING PLOW WITH JOINTER AND GAUGE 



WHEEL 



point is shown in Fig. 43. Chilled plows are very hard, 

 but will not scour in all soils. The share can only be 

 ground to an edge when dull, or it may be replaced at a 

 small cost. 



98. The hillside plow. In localities too sloping to 

 throw the furrow uphill, hillside or reversible plows are 



FIG. 44 A REVERSIBLE OR HILLSIDE PLOW WITH KNIFE COULTER 



used. A plow which may be made a right- or left-hand 

 plow by turning it under on a hinge to the standard is 

 shown in Fig. 44. In irrigated districts where deaJ fur- 



