II Oct., 1909.] SUos and Silage. 669 



side, checked i inch deep by 3^ inches wide for the attachments which are 

 fixed to slats with two 2 -in. x No. 14 screws to each and with a V-shaped 

 cut beneath attachment to allow tor insertion of sprockets. The slats 

 may be made to carry up on the top or bottom floor b\ using an additional 

 i2|-in. diameter sprocket wheel as an idler secured on a 3-in. x ^-in. 

 iron bar fixed as shown in drawing. The elevator is nailed together with 

 2 -in. nails from the inside, the nails well punched, clinched and then 

 punched again. Great care must be taken that nothing will project inside 

 the elevator which may catch the slats. The elevator is supported in 

 the centre, as shown in drawing, with a T-piece made of a lo-ft. length 

 of 4-in. X 2-in. hardwood, checked | inch at top and well spiked to a 

 piece of 6-in. x i|-in. hardwood, and fixed at bottom end to silo. 



The following is a list of material required for the 60-ton silo speci- 

 fied. Some of the items are slightly in excess, in order to meet contin- 

 gencies : — 



Red-gum, P-in. x 4-in. ; 8 6-ft., 8 4-tt., 8 3-ft., foundation posts. 



Hardwood, 4-in. x 2-in. ; 6 24-ft., '27 21-ft., 2 20-ft., 4 16-ft., studs and purlins. 



Hardwood, 6-in. x U-in. ; 5 12-ft., scaffolding. 



Hardwood, 6-in. x 1-in. ; 1 12-ft., port Imle sills. 



Hardwood, 6-in. x ^-in, ; 61 18ft., hoops. 



Hardwood, ."Mn. x 1-in. ; 2 16-ft., supports for bottom purlins. 



Oregon, 3-in. x 1-in. ; 4 15-ft. , port hole doors and stops. 



Galvanized iron, plain sheets, 24 gauge ; 56 72-in. x .36-in., lining. 



(galvanized iron, corrugated slieets, '^6 gauge, 16 9-ft., roof. 



Galvanized iron, ridging, 26 gauge ; 3 lengths 16 in., roof. 



Galvanized iron, springhead nails, 2^-in. ; 3 lbs., roof. 



Wire clouts, 12 lbs. l|-in. : 3 lbs. f-in. 



I^olts, nuts, and washers, 2 6^ -in. x |-in., ridge purlins and studs. 



Bolts, nuts, and washers. 8 o^-in. x g-in. , other purlins and studs. 



Bolts, nuts, and washers, 8 4-in. x |-in., port holes. 



Bolts, nuts, and washers, 82 S^-in. x |-in., treble hoops and studs ; lapped hoops, 



plate washer, and stu i. 

 Bolts, nuts, and washers, 36 3-in. x |-in., lapped hoops. 

 Bolts, nuts, and washers, 200 2J-in. x -| in., outer hoops and studs. 

 Bolts, nuts, and washers 16 9^-in. x A-in., foundation posts. 

 Bolts, nuts, and washers, 16 8-in x ^-in., treble hoops and foundation posts. 

 Bolts, nuts, and washers, 8 6^-in. x ^-in., fonndation posts. 

 Wire nails, 2 lbs. 4-in., 4 lbs. 3-in., 14 lbs. 2-in. 

 Plate washers, 24 5-in. x 1-in. x ilr-in., with fin. hole in centre. 

 Tar — 5 gallons, with long-handled brush. 



MdJtrkiJ h'cqiiiredfor IW-ft. Elevator. 



White deal, 6-in. x 1-in. ; 18 20-ft., sides, floors, and ledges. 



White deal, 6-in. x ^-iii. ; 8 15-ft., cover and groove 



Oregon, 6-in. x IJ-in. ; 1 S-ft., bearers. 



Oregon, 3-in. x 1-in ; 6 lO-ft., diagonal bracing. 



Hardwood, 4-in. x 2-in. ; 1 lO-ft., support. 



Chain, 53 feet, 1 /^-in. pitch. (>o. 45 link.) 



51 Oregon slats, with attachments for No. 45 link. 



2 8i-in. diameter sprocket wheels, 17 teeth, with 18i-in and 3-2-in. spindles, \\\i\. 



diameter, for No. 45 link. 

 4 adjustable bearings. 



1 27-teeth, 12^-in. diameter, sprocket wheel for No. 52 link. 

 1 10-tee'h, 5-in. diameter, sprocket wheel for No 52 link. 

 11 -ft. chain, 1^-in. pitch. (No. 57 link.) 

 8 2^-in. X ^-in. bolts, nuts, and washers. 

 8 f-in. iron washer.«, for f in. bolts. 

 1 sheet of 72-in. x .SfJ-in., 2-in. gauge iron. 



The cost may be computed from above list. At present prices of material 

 in Melbourne it would run into ^27 14s., of which ;^7 4s. is for the 

 elevator. With an experienced builder, assisted by three handy men, the 



