THE ELASTIC ROD. 



313 



the dasher, it rebounds, and thus saves considerable 

 expenditure of power. 



Fig. 102. 



Churning with the Treadle Lever. — In many 

 places the churn is put in motion by the feet, as in Fig. 

 103, where several levers are united to produce the 

 upward and downward motion of the dasher. The 

 longer arm of the lever is connected with the churn, 

 and the shorter is set in motion by a foot-board. 

 The foot-board lies on a roller, with its longer part 

 attached to the lever ; and by throwing the weight of 

 the body upon this part the shorter arm of the lever 

 is drawn down, and the longer, attached to the churn- 

 '•27 



