OB SUBSOILING PLANT. 



89 



For this reason great attention must be paid to the fixing 

 of this anchor, as otherwise it would be pulled out during 

 the course of work, involving undesirable waste of time. 

 The chain a b c (Fig. 56) is about 65 feet long. After a 

 certain number of furrows have been ploughed, this anchor- 

 ing chain is displaced along the headland towards the cap- 

 stan. The anchor A being fixed 65 feet to the right of the 

 anchor A!. 



Generally the cable is allowed to slide on the ground ; how- 

 ever, when stationary capstans are used it is preferable to 

 support the cable on runners. Figs. 57 and 58 represent 

 stationary runners, the cable a passing in the groove of a 

 pulley A revolving on a horizontal axle mounted on a 

 w r ooden frame. 



When hauling back cables are used it is advisable to 

 support the small cable on runners travelling sideways 

 automatically with the cable (Fig. 59). This figure shows 

 one of these ; the pulley A is mounted on a wooden frame- 

 work B travelling on three wheels E, revolving in a direc- 

 tion perpendicular to that of the cable. Movable runners 

 are also made with iron frames (Fig. 60). 



Fig. 59. Movable Runner. 



Fig. 60. Movable Runner with iron frame. 



