MODIFICATION OF STAVE SilX). 99 



stantial; it has been put up in a number of places in the 

 east, and has apparently given good satisfaction for sev- 

 eral years at least. In building this silo some good, tough 

 oak plank two inches thick and of any convenient length 

 are procured. Rock elm will do, although not as good as 

 oak. The planks are sawed into strips half an inch thick. 

 The foundation of the silo is made of concrete, and a little 

 larger than the outside diameter of the silo. A stake 

 Is set in the center and on this a piece is nailed, just long 

 enough to act as a guide in setting scantling when erecting 

 sides. For sides I%x4-inph hemlock of any desired length 

 is used. These are set up on the circumference of the 

 silo, perpendicular to the bottom, 3 feet and 7 feet up nail 

 on the outside one of the half-inch strips mentioned be- 

 fore, being sure to keep the circle regular. This will keep 

 upright pieces in place until the circle is completed. On 

 each hoop so started other half-inch pieces are nailed, 

 lapping them in different places until each hoop is three 

 Inches thick. Other hoops are now put on in the same 

 manner, placing them one foot apart at bottom, up to the 

 three-foot hoop 16 inches apart from three to the 7-foot 

 hoop, then increasing the distance between each hoop two 

 inches, until they are 30 inches apart, at which distance 

 they should be kept. If staves are to be spliced it should 

 be done on the hoop. When this is done, a silo will be 

 made of I 1 /&x4 inch, thoroughly hooped with wooden hoops 

 2x3 inches. 



The inside may be covered with the best quality of 

 felt, well tacked to the staves, on which a thick coat of 

 thick coal tar is spread; over this another thickness of 

 felt is put while the tar coating is still green. The silo is 

 lined with f^-inch Georgia pine ceiling, nailing thoroughly, 

 and the lining coated with two coats of coal tar, putting 

 on the first one quite thin, but using all the wood will take 

 in, and for a second coat tar as thick as can be spread. 

 Give plenty of time to dry before filling. 



The outside of the silo may be boarded up with ver- 

 tical boarding, or it may have strips nailed on hoops and 



