The Modern. 8ilo. 82S 



A suitable site liaviug been selected, and levelled if necessarv^ 

 place a stake in the centre qf this space, and with a lath 7 feet long-, 

 describe a circle lo feet in diameter. This circle then forms the 

 outside of the line of the stumps. Fix the stumps at equal distances 

 round this circle, about 2 feet 5 inches from centre to centre. The 

 tops should not project more than inches above the level of the 

 ground, and they require to be well rammed, as the stability of 

 the silo against the wind is largely dependent upon the way it is fixed 

 to the foundations. Mark on the top of the stumps a circle with a 

 radius of 6 feet 4 inches, and fix the 9 x o plates in position, so that 

 the outside of each plate at the middle of its length comes flush to 

 this circle, and the ends jiroject beyond it. The line by which to cut 

 each plate, in order that they may form a regular octagon, may be 

 found by laying on it the lath from the centre peg. The exact 

 length of the outside edge of each plate will be found to be 4 feet 

 11 J inches. The ]^lates ai-e then securely spiked or bolted to the 

 stumps. 



Next mark on the plates two circles with a radius of <> feet 4 inches 

 and i) feet 2 inches respectively. The inside one is the line of the 

 inside of the silo. The 4 x 2 studs are then halved for 4 inches at 

 onf end, and their jiositions are marked on the outer circle 10 inches 

 apart. There will be one space a couple of inches wider, which will 

 serve for the port holes. Where necessary, the plates are checked 

 out to the 6 feet 4 inch line, so as to take the end of the studs, the 

 inside edge of the studs thus standing true to the <) feet 2 inch line 

 all round the silo. In fixing the studs in position, care must be taken 

 to keej) them plumb both ways, the 12 feet and lo feet studs being- 

 placed alternately. AVlien 8 or 10 of them have been braced in 

 jiosition, fix on temporarily two or three of the inside lining boards,j 

 and then nail on the battens to form the first hoop 18 inches fi-om the 

 plate. As it takes three battens to go round the whole silo, the ends 

 shoidd not be butt-jointed on the same stud, but should overlap by 

 at least one stiul. VVheu the battens are fixed so as to complete the 

 hoops to a height of 12 feet, the top studs, 4 x li, are nailed on to 

 the sides of the 4 x 2's, about 2 feet being allowed for the lap. The 

 outside hoops are made to " break joints " as much as possible so as 

 to add to the strength of the structure. The same applies to tlie 

 il inside lining; but in this case "butt joints" are made on each 

 stud, so that the inside surface may be finished perfectly smooth. 

 The ])aper m-av be tacked on in horizontal stri])s at the time of 

 filling. 



The ])ort holes are ujiule at intervals of 4 feet vertically, and should 

 l)e about is inches s(|ua]'e. Tlu> doors are made of a double thick- 

 ness of (■» X 1 T. and G. Three 18-inch lengths are placed side by 

 side, and three similar ])ieces nailed cross-wise to them with a sheet 

 of r. and B. paper between. The stops to receive the doors ai'e 

 made of o x J, nailed to the sides of the two studs which form the 

 jambs, so that the inside of the door is fiush with the inside of the 

 silo. The sill and lintel to complete the port-hole may be made of 



