186 



THE OLIVER PLOW BOOK 



When hitching two horses to a sulky plow it is better to spread them 

 apart. It gives the advantage of having fresh air circulating around 

 them so that they can work to good advantage as well as to give the plow 

 the advantage of wording in the true line of draft. A thorough under- 

 standing of the draft line of plows will save a great deal of plowing 

 trouble which is unnecessary. 



whether he can adjust the plow as he desires it to run. 

 The setting of the share is discussed in Chapter XV. 



When two horses are hitched abreast the effect is 

 equivalent to hitching two forces, one on each side of 

 this theoretical center line of draft. That is, an equal 

 force is operating on each side of the center of weight of 

 the plow. These horses must be hitched so that the 

 leverage is the same for both, otherwise one of the horses 

 will be doing the greater amount of work. The closer 

 one adheres to this theory the more necessary it becomes 

 to regulate the width of singletrees and doubletrees in 

 accordance with the size of the teams. 



