BONE MILL. 

 B 



Side elevation. 



through the interstices of the wire ; 

 those which have not been sufficient- 

 ly broken come out at the end, and 

 are returned into the upper hopper. 

 Where a machine of this description 



I 2 



can be attached to a water or wind 

 mill, or to a steam-engine, the bones 

 are broken at a small expense ; when 

 horses are used the expense is great- 

 er ; and a hand mill can only be of 



101 



