WOOD SILOS. 



27 



square inch, so that 

 for a 16x30 silo the 

 hoops should be ap- 

 proximately 3 inch- 

 es square. This size 

 is necessary at the 

 bottom in order to 

 stand the pull, and 

 the same size should 

 be used at the top, 

 so that the hoops 

 will be large enough 

 to brace the silo wall. 

 This silo is not very 

 widely used, but 

 seems practicable in 

 a very wide range of 

 conditions, and in the 

 opinion of the writer 

 is destined to become 

 one of the very popu- 

 lar wood silos. 



Stave Silos. The 

 stave silo is common- 

 ly called the tub silo, 

 and is ordinarily 

 made of 2x6 tongued 

 and grooved staves 

 held together by 

 hoops made of steel 

 rods, joined at the 

 ends by means of mal- 

 leable iron lugs and 



Fig. 5. The independent door. 



