66 SCIENCE OF THRESHING. 



the lacing to break off. For ordinary work a punch 

 making a hole about five-sixteenths of an inch across 

 is the most convenient size for ordinary work. A 

 smaller one should be used for the holes for the 

 lacing ends, which should pass through tightly. 



In punching the holes, care should be taken to 

 space them evenly at equal distance from the belt 

 edge. An odd number of holes, as three, five or 

 seven, according to the width of the belt, gives the 

 best result. 



The start should be made by passing the lacing 

 ends through the two center holes from the flesh side. 

 Then lace from the center once through each hole 

 until the belt edge is reached, using one end of the 

 lacing for the holes on one side of the center, and the 

 other end for the other holes on the other side of 

 the center. Then pass the ends of the lace through 

 each outside hole again, thence through the suc- 

 ceeding holes, until the center is reached. Then pass 

 the lace ends up through the small retaining holes. 

 By starting as described, it leaves the ends of the lace 

 projecting on the pulley side, which prevents them 

 from slapping and wearing off as they pass round the 

 pulley. It also leaves the belt lacings crossed on the 

 pulley face of the belt, thus giving more surface for 

 contact. 



When finished the lacing has been passed through 

 each hole twice, and is what is called double lacing. 

 The lace end should project about three inches when 

 finished. Punch the small retaining hole in line with 



