116 



THE OLIVER PLOW BOOK 



The right-hand side of the furrow slice is laid on the furrow bottom 

 in such a way that the forward travel of the mouldboard will give it a 

 pinching, crushing motion to separate the soil particles. 



In the seventh paragraph of this chapter the plow 

 bottom is referred to as a three-sided wedge. 



The mouldboard and upper part of the share form the 

 curved wedge shape part which separates the soil parti- 

 cles while turning them over. For the sake of clearness 

 in this discussion the work of the plow bottom is divided 

 into three parts: first, the share, cutting the furrow sole; 

 second, the shin, cutting the furrow wall; third, the 

 mouldboard, lifting, stretching, turning and compacting 

 the furrow slice into an inverted position. 



The relative amount of work that the shin, the mould- 

 board and the share do is exceedingly hard to figure. It 

 is very doubtful whether an absolute center of draft can 



