FEEDS AND FEEDING 



129 



Make a hole, I, in the lower end of each crusher arm 

 for an iron pin. The smaller cut at the right shows 

 the details of the crusher arm. There must be space 

 enough at m to let through the fine-crushed stone. 

 The handle part is made as follows: The central 

 block, g g, is of four by four-inch lumber and two feet 

 long. It is attached by a bolt through the middle of 

 the handle, k, which is five feet long and strengthened 

 by side pieces fastened to the main block by tight bolts 

 at i, passing through small blocks two by two by two 

 inches at g. The four connecting strips, e, are of one 

 by two-inch stuff bolted at one end loosely to g, but 

 at the other end tightly to d. The machine is now 

 complete except to nail boards, / ;', on the sides to keep 

 in the stones. 



FIG. 52 — GRIT CRUSHER 



