SILOS AND ENSILAGE. 



are raised and fixed in position by driving wedges between 

 the posts and the wall, as shown in figures 4 and 5, in 

 which a, a, are the wedges ; b, b, the planks ; c, a clamp 



Fig. 1. THE ARRANGEMENT OF THE POSTS. 



holding the planks together, and wedged on one side, and 

 d, d, the posts. The posts will usually need to be braced 

 well to prevent their springing when the wedges are 

 driven tight enough to support the planks. 

 Figure 4 shows a section of the wall and one post with 



^ -a 



~nr T~ ~^b~ IB ET 



Fig. 2. ARRANGEMENT OF THE PLANKS. 



the wedges, as looked down upon, and figure 5 is a per- 

 pendicular cross-section of the same, the letters refer to 



