THE "WISCONSIN" SILO. 71 



a certainty. These are (1) a lining which shall be and 

 remain strictly air-tight, (2) a lining which will be reason- 

 ably permanent. 



All Wood Lining of 4-inch Flooring. If one is willing 

 to permit a loss of 10 to 12 per cent, of the silage by heat- 

 ing, then a lining of tongued and grooved ordinary 4-inch 

 white pine flooring may be made in the manner repre- 

 sented in Fig. 9, where the flooring runs up and down. 

 When this lumber is put on in the seasoned condition a 

 single layer would make tighter walls than can be secured 

 with the stave silo where the staves are neither beveled 

 nor tongued and grooved. 



In the silos smaller than 18 feet inside diameter the 

 two layers of boards outside will give the needed strength, 

 but when the silo is larger than this and deep, there would 

 be needed a layer of the split fencing on the inside for 

 strength; and if in addition to this there is added a layer 

 of 3-ply Giant P. and B. paper a lining of very superior 

 quality would be thus secured. 



Lining of Half-inch Boards and Paper. Where paper 

 is used to make the joints between boards air-tight, as 

 represented in Fig. 4, it is extremely important that a 

 quality which will not decay, and which is both acid and 

 water-proof be used. A paper which is not acid and water- 

 proof will disintegrate at the joints in a very short 

 time, and thus leave the lining very defective. 



The best paper for silo purposes with which we are 

 acquainted is a 3-ply Giant P. and B. brand manufactured 

 by the Standard Paint Co., of Chicago and New York. It 

 is thick, strong, and acid and water-proof. A silo lining 

 with two thicknesses of good fencing have only small 

 knots, and these thoroughly sound and not black, will 

 make an excellent lining. Great care should be taken to 

 have the two layers of boards break joints at their cen- 

 ters, and the paper should lap not less than 8 to 12 inches. 



The great danger with this type of lining will be that 

 the boards may not -press the two layers of paper together 

 close enough but that some air may rise between the two 



