THRESHING 75 



utes for a large steam threshing outfit to be pulled 

 up and set in a new location. 



Tractors which burn kerosene or gasoline have 

 also come into general use in many places, especially 

 where they are used for other farming activities. 

 In some places the same gas tractor is used in 

 plowing, seeding, cutting, threshing, and hauling 



FIG. 46. The steam traction engine. Power for operating threshers is furnished 

 also by horses and by engines, but steam tractors are the most common. 



the wheat to market. This, however, represents 

 the extreme usage of the gas engine in the wheat- 

 producing industry and is not typical in many 

 countries. The horse is still the most generally 

 used power in all but the threshing operation. 



The Rate of Work. - - With the smaller threshers, 

 500 bushels per day is considered a fair day's 

 output. With moderate size machines 2000 bush- 



