KILN 



21 



rated from the rest by two moveable diaphragms, b, b', to form a drying chamber. 

 The entire kiln is capable of being subdivided into a number of compartments, 

 numbered in jig. 1301 from 4 to 10 inclusive, although any other number maybe used. 

 Each compartment is provided with a door at c, through which the goods are intro- 

 duced and removed. From the upper part of the several compartments extend a 

 series of flues, d d, converging towards, and opening into, an annular smoke-chamber, 

 e, -which surrounds the chimney,/, and communicates therewith by the passages or 

 openings, g. The inner ends of these flues inside the smoke chamber are closed or 

 left open by means of conical plugs, k k, which, by being elevated, will regulate the 

 amount of opening of the flues. A closed man-hole, i, Jig. 1302, is made in each of 

 these flues for the facility of cleaning. Valves, k (fig. 1301), connect any one of these 

 flues, when open, with the annular passage, I, for dry or warm air, the bottom of the 

 passage conjmunicating, by means of valve m, with the flues, n, which lead from the 

 lower portion of the compartments of the kiln to the smoke chamber, e, before referred 

 to. These flues, n, are also provided with conical plugs or dampers, o, similar to 

 those which are fitted on to the inner ends of the flues, d. 



In Jig. 1301 the chambers 4 and 5 are represented as being shut, off from the doors, 

 b, b', and are supposed to contain green bricks ; the chamber 6 is being filled whilst 



the goods are being removed from chamber 7 ; the chambers 8, 9, and 10, all contain 

 burnt goods in the act of cooling ; whilst the other chambers are being fired, the hot air 

 therefrom passing through the goods in the chambers 1 and 2 (not shown), and being 

 obstructed by the door, b, from entering the drying-chambers 4 and 5 direct, it passes 



1302 



by the bottom flue, , of the series direct to the smoke-chamber, e, and thence to the 

 chimney, the plug or damper, being more or less open for that purpose according to 

 i he draught required. The fresh air enters by the doors, c c, passes through the 

 heated goods in the chambers 7, 8, and 9, thereby cooling the goods, and at the same 

 time taking up the caloric. A portion of this air so heated passes onwards through 

 the chambers 10, 11, 12, 1, 2, and thence by the flue, n, to the chimney, whilst 

 another portion enters one of the flues, d, at the mouth thereof, and as the plug or 



