118 



THE OLIVER PLOW BOOK 



The work of this bottom shows remarkable adaptability to this type 

 of soil. The squeezing, pinching motion of the mouldboard by forcing 

 the furrow slice against the bottom of the furrow is plainly noticeable. 

 This mouldboard is doing more work than the one illustrated on page 120. 



be determined for all conditions. Enough experimenting 

 has been done to show that the center of draft can be 

 approached closely enough for practical purposes. 



When once the center of draft has been determined it 

 is obvious that the amount of work being done on all 

 sides of this point must be equal in weight. Measuring 

 the distance from this point to all the extremities of the 

 mouldboard and share will give sufficient measurements 

 to figure the percentages. The result will be close 

 enough for all practical purposes. 



