Jan. 2, 1908.] Agricultural Gazette of N.S.W. 39 



lias not fouud it wholly sati.sfactoiy. The great point in favour of the iron silos is, of 

 course, the cheapness of building. If, however, efi'ectiveness is sacrificed for cheapness, 

 it is a doubtful economy. And that appears to be the danger. The best resiUts have 

 not been obtained from the iron structures, but from a wooden silo, which was about 

 the first one erected in the State. Ahnost invarial)ly, so Mr. Foster states, there is a 

 M'aste of 3 or 4 inches round the edge, and no explanation can be given of the cause, 

 and no remedy suggested. Whether it is the ettect of alternating heat and cold upon 

 the thin walls, or some corrosive effect jiroduced by chemical action of the fermentiug 

 mass and the iron, he is at a loss to determine. Unless the fault can be rectified, he 

 intends to buihl of wood in future. 



Ill the Titanic Asbestos silo which is being placed on the nuu-lvct by 

 Messrs. Noyes Brothers (Sydney), himited, 109, Pitt-street, and fully 

 illustrated in this issue, the circular form of the standard lOO-tou (24 ft. 

 X 16 ft.) wood tub silo has been kept to as nearly as the dimensions of the 

 Titanic sheets would allow, the height being 24 ft. 7i in. by an approxi- 

 mate diameter of l.j ft. 6 in., which is arrived at by having twelve sides 

 each 4 feet : this gives a content of 4,403 culjic feet, with a capacity of 

 94 tons of ensilage, allowing 48 lb. to the cubic foot, which is a fair 

 average weight per foot for a deep silo. The Titanic asbestos silo can be 

 made any size the sheeting will work in with, but the stock size is the one 

 illustrated. This size lias the advantage of depth, which is very im- 

 portant, while the area is not excessive. The 100-ton silo is the most 

 popular size in the T'nited States for dairymen. 



The sheets are 8 ft. 2^ in. x 4 ft. A silo can Ije made of any number of 

 sides and height, but it is better to have them fairly high, to obtain 

 better solidification of the chaffed fodder. If a silo is desired havintr a 

 different number of sides to the one illustrated, it would be necessary to 

 cut the studs from the 6 in. x 4 in. stuff at an angle to suit. 



Referring to Fig. 1, the silo is seen in elevation. The doorway, it will 

 be observed, is a continuous one ; this form of doorway is the kind abso- 

 lutely insisted on in all tub silos in the United States, and has many 

 advantages. 



In Fig. 2 a single section is shown in elevation. In this the method 

 of fitting the battens to the studs is show'ii, and the distances at which they 

 are spaced to suit the size of the sheets are set out. It should be observed 

 that the sections are absolutely independent of each other, but are Imilt 

 exactly the same in every way, except the doorway section, wliich is shown 

 in the same illustration. These sections are accurately fitted at the works 

 to the dimensions shown, and when erected in position, as shown Ijy the 

 ground plan. Fig. 3, form what is practically large staves of a tub ; these 

 sections are bolted together at the corners, as shown in Fig. 1, and are 

 in addition bound together, just as a cask is, by means of iron rods of 

 special design. These rods, together with the bevelled studs, are the dis- 

 tinctive feature of this form of construction, and are clearly shown in 

 position in Fig. 4. 



In Fig. 5 it is shown how two studs having the required bevel are cut 

 from one 6 in. x 4 in. piece of hardwood. The angle of the bevel varies 



