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HOW TO BUILD A SILO. 



are taken from two bulletins on this subject, published by the 

 Cornell and Ottawa Experiment Stations. For a silo 20 feet in 

 diameter, a circular trench 18 inches to two feet wide and with 

 an outer diameter of 22 feet is dug about 2 feet deep, or below 

 the frost line. The surface soil over the whole included area, 

 and for 2 feet outside, is removed to a depth of 10 or 12 inches 

 at the same time. The trench is then filled to the level of the 

 interior with stone, well pounded down, the surface stone being 

 broken quite small, and thin cement (1 part of cement to 4 of 

 sand thoroughly mixed) poured over, well worked in and. left 

 for a few days. This is followed by a coat of good cement (1 

 part cement to 3 sand), care being taken when finished to have 

 the surface level and smooth. 



The silo is set up as shown in Fig. 17, which shows a cross- 

 section of one method of construction. 



J..-J. 



Fig. 17. Cross section of stave silo. The dotted lines show how 

 scaffolding may be put up. 



