a groove should be made, into which a tongue, projecting, 

 say, two inches all round into the mortar, is fixed. 



To make the door perfectly air-tight, it is well to put 

 something, either a strip of rubber or some puddled clay 

 will answer well, between the door and the jamb. The doors 

 open inwards and are removed one after another as the 

 operation of emptying proceeds downwards. Strong screws 

 or, better, quarter-inch bolts, are used for drawing doors 

 tight agaist jambs. If the framework of the doors is 

 flush with the sides of the silo, then they (the doors) being 

 straight, their centres will be an inch or two inside. This 

 disadvantage cannot very well be avoided. So that as little 

 resistance as possible will be offered to the sinking silage, 

 the crevice should be filled with cement, with a gentle slope 

 up and down to the wall. The roof may take the form of 

 a cone. Less material is required for this shape, but, per- 

 haps, more skill is required for its construction than with 

 the method shown in figure I. The roof has a built-out 

 framework for the last filling and first feeding door. The 

 inside should now be plastered with a coat of good cement 

 and sand (1 to 2), and trowelled as smooth as possible. 

 Whitewashing annually will be found to protect the plaster 

 from the dissolvent action of the silage. At the apex of the 

 cone, or in the centre of the roof, some arrangement for 

 ventilation, either simply by a pipe, protected from rain, or 

 by square cupola, fitted with loose boards, will have to be 

 provided. As regards the filling of this kind of silo our 

 remarks contained on page 17 will apply. The filling, 

 however, from its height above ground, in this case is not 

 so simply performed as is the case with the sunk or pit silo. 

 If the fodder is being cut by steam or horse-power, it will 

 be easy to work an elevator to the top door. The elevator 

 should be so made that fodder is deposited into the middle 

 of the silo. From there it can be_easily distributed evenly 

 to all points, trampled down and well packed at the sides. 



Should the crop for any reason have been left till it has 

 lost some of its succulency, it is well to add some water to 

 it in the silo. Where silage is fed all the year round the top 

 layers are sometimes removed again for feeding with as soon 

 as the last lot has been added, and thus without the use of 

 weights of any kind, the loss of the top exposed materials 

 is saved. If the feeding is not to commence immediately, 

 however, it is better to pack well, and then cover with some 

 worthless matter or straw. 



Of course, where good building stone is plentiful, a silo 

 may be made of that, and it would undoubtedly prove, if 

 intelligently built, stronger than a brick one. The plans 

 would be practically the same as those given for the brick- 

 built silo already described. Hooped wooden silos have also 

 been much used. They go by the name of " Stave Silos." 



