TILLAGE MACHINERY 97 



Such a device is called a treadle guide, and is often a very 

 desirable feature. 



Pivotal wheels are a scheme for guiding cultivators. 

 The wheels may be connected to a treadle device or to a 

 lever worked by the hands. This plan permits of an easy 

 control of the cultivator. 



FIG. 68 A RIDING SURFACE CULTIVATOR 



A walking, tongueless cultivator with four-shovel 

 gangs is illustrated in Fig. 65. The tongueless offers one 

 advantage in requiring less room for turning. It is essen- 

 tial that the team work very evenly to do good work. 

 Fig. 66 illustrates a balance-frame six-shovel riding culti- 

 vator with a hammock seat. The wheels may be drawn 



