142 QUEENSLAND AGRICULTURAL JOURNAL. [1 Sepr., 1902. 
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it to emptying itself into its assigned’ elevator bin. When the duplicate ‘ 
weighing-machine is full, the first is empty, and so these weighing-machines — 
work along alternately. In the largest elevators a more elaborate system of 
the same nature is used. The weighing-machines are made by the principal — 
scale-makers. ‘The weighing-bins and other machinery in the top of a wooden 
elevator are supported on a different structure (separate) from the bins. The 
sides of these latter, in large elevators, vary in height several feet, according to 
their state of dryness, and are not a fit basis for the support of shafting, & 
This great expansion and contraction of the walls of the bins is a pecu- 
liarity of wooden elevators; brick and steel bins are more stable. 
_ Fig. 5.—Diagram of a ‘“‘zig-zag.” The grain-carrying belt is shown at 1, 2, 3, and the direction 
of its motion is indicated by arrows; 4 and 5 are pulleys used to zig-zag the belt. The grain is 
shot into a trough, 6, which empties into a spout, 7, leading to a bin or elsewhere. 
The grain is spouted from the weighing-machines to any desired bin by 
means of belts and various ingenious spouts, the best spout I have seen being 
the design of E. D. Mayo, of Minneapolis. This is an elbowed revolving iron 
spout, with a high degree of adjustability. A circular steel track 12 feet im 
diameter is hung from the ceiling under the weighing-bin, concentrically with — 
the mouth of the bin. A light and simple steel carriage running on this 
circular track supports the lower end of the iron spout, which runs out at an 
angle of 45 degrees from the mouth of the weighing-bin. This spout, therefore, 
revolves in a circle, and can be pointed in any direction; and attached to its 
lower end is a second long iron spout, with adjustable joints. The lower end 
of this latter rests on the floor containing the trapdoors leading to the various 
bins, and this lower end being on castors the spout can be easily dragged by 
hand and placed over any trapdoor within a radius of 15 or 20 feet. 
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