[ ^cntilatoTS for Corn Stacks 



359 



able, and put on when the building of the likely to be of much utility. In order that 



stack has got up to the line d c (a). A space, it may be better understood by our readers 



as indicated by the dotted lines / if (a), is we give the following engraving and descrip- 



left in the inside of the stack in addition to tion : — 



A wrought-iron tube (a) 3 inches in dia- 



^ meter, long enough to reach the centre of a 



/ \ stack, perforated with holes about two-thirds 



/ h \ the length, and furnished with a point (b) at 



/ ^ one end, and a strong iron band (c) with 



lugs (d) at the other. This tube is driven 



horizontally into a heated rick with a mallet 



or beetle, and at once affords the means of 



ascertaining the temperature of the stack, 



V' which is done by passing a thermometer on 



/ .^- 



the space h ; thus a thorough ventilation of 

 the stack in the direction of its length is 

 secured. Cross or transverse ventilation 



a b c 



B 



might be also secured by having openings not 

 filled in with com in the side walls of the 

 kiln, although these will not be so much re- 

 quired, as a good amount of air will pass 

 through the corn which makes up the sides. 

 All these plans, of having spaces within the 

 stacks, obviously admit of the application of 

 means of drying their contents artificially, 

 and in a manner easily compassed where 

 there is a steam-engine on the premises. 



We shall conclude by describing a rick 

 ventilator, patented by Mr E. Lyewood, 

 a Hampshire farmer, which appears to be 



a stick into the tube. Wlien it is ascertained 

 by this means that any part of a stack into* 

 which a tube is inserted is of too high a tem- 

 perature, a vertical sheet-iron funnel (e) is 

 attached to the neck of the tube, at once es- 

 tablishing a current of air from the centre c^ 

 the rick to the atmosphere, and immediately 

 removing the superfluous heat, without dis- 

 turbing or damaging the contents of the rick 

 in any way. At the back of the point b 

 several small hooks (f) are placed, so that in 

 drawing out the tube a sample is brought 

 from the centre of the rick. 



