148 THE OLIVER PLOW BOOK 



Enough has been said to show that a dull, or incor- 

 rectly shaped share can do irreparable damage, and the 

 operator never discover the source of the trouble unless 

 he takes time to investigate. 



Incorrect hitching and a dull share combined cause a 

 plow to do so many erratic things that the share symptom 

 is often overlooked in seeking to rectify the trouble by 

 hitch adjustments alone. 



