502 Journal of Agriculture, Victoria. [lo July, 191 i, 



trammel must be used at an angle which necessitates the trammel being 

 lengthened to bring it within h in. of post at a distance of 5 in. from the 

 top of the post. 



Lining. — Before setting up the lining for the outside of wall, decide 

 on the position of port holes. These, to the number of four, should be 

 vertically above one another, and so located as to make the transport of 

 silage to the feeding place as easy as possible. The fir.st upright to be 

 erected should form one side of the port holes. The port holes need not 

 be in line with the ridge. They may be at any part of the silo. Erect all 

 the uprights for the outside lining around to within 24 in. of the first 

 one erected. The lining is to be fixed to both treble hoops, one nail being 

 used in the centre of each board for each treble hoop. Knock out one 

 board every 6 ft. to allow for a scaffold, using the hoops to support it. 

 Rend a single hoop round temporarily on the top of treble hoop and cut it 

 to the same circumference as the inside piece of the treble hoop. Mark 

 at spaces left for scaffolding so as to keep the same spaces and the same' 

 diameter to the Xo\) of the silo. All hoops above the treble are to be 

 double, with joints broken, the inside hoop being butt-jointed and the 

 outside having a lap of 2 ft. bolted with 4-in. x f-in. bolt and plate 

 washer. The double hoops are spaced 2 ft. i in. apart. 



Lime-wa.sh with a good thick coat the inside of outside lining before 

 putting up the inside lining. Proceed with the in.side row of uprights, 

 covering all joints sO' as to^ form a 2-in. lap. Only one nail must be used 

 at each hoop. The nail should be driven through the centre of the board. 

 This will minimize the risk of splitting if the timber should shrink. 



Remove the .scaffolding and fill in the spaces. This will be done from 

 a ladder. The ladder is to be constructed of 3-in. x li-in. uprights, with 

 3-in. X I -in. treads ; and, when building is finished, to be fixed to the out- 

 side of silo near the port holes. Fill in between port holes, which should 

 be placed as follows : — The lowest between the top treble hoop and first 

 double hoop, the second between second and third double hoops, the third 

 between the fourth and fifth double hoops, and the fourth between the 

 sixth and seventh double hoops. The doors are made of 4 in. x i in., with 

 joints lapi)ing as in the wall. Allow the top and bottom of doors to 

 come in behind the hoops, which will help to keep the doors in position. 

 Stiffen the doors with two 3-in. x i^-in. cleats on edge cut to curve and 

 well skew-nailed. The doors are held in position by the pressure of the 

 silage. 



Roof. — Bolt, to the inside of wall, ten studs tO' carry the purlins; the 

 ridge purlins to be located to suit the position of the elevator, and the 

 studs carrying them are to stand 3 ft. above top of wall. The heights 

 of the other studs are regulated by the pitch of roof. The tops of studs 

 are to be checked for and bolted to purlins with f-in. bolts. Allow each 

 end of ridge purlins to project 2 ft. beyond silo wall, in order to attach 

 block and tackle for hoisting elevator to position and material for weighting 

 silage. 



Cover purlins with 9-ft. sheets of 26-gauge corrugated iron, allowing a 

 lap of one and a half corrugations. Secure with 2| in. springhead nails 

 at every third corrugation. Fix three lengths of i6-in. galvanized ridging 

 with springhead nails every 2 ft. 



The walls should be supported on a concrete bed composed of one part 

 cement, two parts sand, and four parts gravel. This is to be laid after 

 the completion of the silo, and should be about 12 in. wide at Viottom, 

 6 in. at top, and bigh enough tO' meet bottom of wall, to which it will be a 

 finish and a good support. 



