and the Economy of Fuel. 131 



which stands in the centre of the cross. The dampers 

 are thin flat tiles; the grates on which the fuel is 

 burned are composed of common bricks, placed edge- 

 wise ; and the passages leading to the fire-place, and to 

 the ash-pit, are closed by bricks which are made to slide 

 in grooves. 



Under the bottom of each boiler, which is quite flat, 

 there are three flues, in the direction of its length ; that 

 in the middle, which is as wide as both the others, being 

 occupied by the burning fuel. The opening by which 

 the fuel is introduced is at the end of the boiler farthest 

 from the chimney ; and the flame, running along the 

 middle flue to the end of it, divides there, and returning 

 in the two side flues to the hither end of the boiler, there 

 rises up into two other flues, in which it passes along 

 the outside of the boiler into the chimney. The boilers 

 are furnished with wooden covers divided into two equal 

 parts, united by hinges. In order that the four boilers 

 may be transported with greater facility from place to 

 place (from one camp to another for instance), they are 

 not all precisely of the same size, but one is so much 

 less than the other, that they may be packed one in the 

 other. The largest of them, which contains the three 

 others, is packed in a wooden chest, which is made just 

 large enough to receive it. In the smallest may be packed 

 a circular tent, sufficiently large to cover them all. In 

 the middle of the tent there must be a hole through 

 which the chimney must pass. The four boilers, together 

 with the tent, and all the apparatus and utensils neces- 

 sary for a kitchen on this construction for a regiment 

 consisting of 1000 men, might easily be transported from 

 place to place on an Irish car drawn by a single horse. 



I have been the more particular in my account of this 



