Sweep Power. 



501 



H. P. for the 1,200, and 1.07 H. P. for the 800-pound 

 horse. These results are about double the horse power 

 for corresponding weights where the draft is A that of 

 the weight of the horse, as given in the table of (609). 



It is a common practice to set the tread power as steep 

 as 2 feet in 8 feet and when this is done it is clear that the 

 horse is called upon to develop power faster than he is able 

 to do and follow it day after day. It is clear also how a 

 horse may be made to do more work in a tread power than 

 when drawing on the sweep power, and why this form of 

 power may appear more effective, when the chief differ- 

 ence is due to the fact that the horse is working harder, 

 and horses are often overworked hi a tread power without 

 knowing it or intending to do so. 



FIG. 241. The sweep power. 



625. The Sweep Power. When horses are worked on a 

 sweep power such as is represented in Fig. 241 it is im- 



32 



