166 FARM ARITHMETIC. 



Michigan Agricultural College show that when the axles 

 of a wagon were greased the draft was 188 pounds per 

 ton; when ungreased the draft was 230 pounds. What 

 is the percentage of difference? 



586. When a 230-pound pull is required to haul one 

 ton, the axles being ungreased, how many tons may be 

 hauled with the same expenditure of power when the 

 axles are greased ? 



The position of the load. The position of the load 

 with reference to the four wheels of a wagon may in- 

 fluence the draft, "as the following table shows. 



Draft with Loads Differently Placed. 



587. Where should the load be placed to secure the 

 least draft ? The greatest ? 



588. How much less draft when load is on hind 

 wheels than when on front wheels in pasture field? In 

 a dry meadow ? What per cent less ? 



589. What per cent less when load is on hind wheels 

 than on one side in pasture field ? In dry meadow ? 



590. What per cent less when load is on the hind 

 wheels than when distributed equally on four wheels in 

 pasture field? In dry meadow? 



591. If 2,000 pounds may be hauled with an expendi- 

 ture of 130 pounds of draft when the load is placed on 



