THE ROLLING COULTER 



165 



in such a way that it will roll into the lower right hand 

 corner of the furrow when the slice is being inverted. 

 For the most part this point is slightly ahead of the 

 point of the plow and on the unplowed land J4" to M" 

 from the shin of the plow. These measurements are by 

 means fixed. The adjustment must be made to 



no 



bring about the desired results. 



The jointer cannot be used by itself in very trashy 

 ground because the trash will catch on the point of the 

 shin and clog the throat of the plow. This fact led to 

 the use of the combined rolling coulter and jointer, the 

 adjustment of which is practically the same as that of 

 the rolling coulter and jointer separately. 



The Combined Rolling Coulter 

 and Jointer 



The combined rolling coulter and jointer is a recent 

 improvement in plows and has made possible the suc- 

 cessful covering of weeds and trash in the lower right 



The combined rolling coulter and jointer is one of the greatest helps for 

 plowing properly. 



