Page 756. 





^M 



Fig. 2.— Showing how the top of a bin can be 

 modified for the use of sand if it is not in- 

 tended to allow the grain to be mixed with 

 sand. 



Fig. 1.— Section through earthenware pot, 

 showing how grain should be kept with 

 a layer of sand at the top. 





Fig. 3 — Showing how grain should be kept in bins with a layer 

 of sand at the top. 



