THE FLORAL WORLD AND GARDEN GUIDE. 



147 



Fig. 2. 



it can be taken to pieces when required. Fig. 2 is intended to show- 

 that when the extent of the piping is not large the boiler may be 

 worked in much the same manner as the old Saddle-back, and its 

 heating capacity increased by the addition, first, of the two ends, 

 and then the top sections, according 

 to the extra work put upon it by 

 the increase of piping. The several 

 compartments are connected to- 

 gether with the patent joint shown 

 on the left hand of Fig. 1, which 

 admits of their being separated or 

 put together in a very short space 

 of time. 



The following description, in 

 connection with the illustrations, 

 will, we hope, convey a clear idea 

 of the details of the construction 

 of the boiler : — 



The boiler consists of niue or 

 more separate hollow castings, placed one upon another. Upon 

 brickwork is placed the basement, or No. 1 casting, consisting of a 

 hollow rectangular frame, in which are fixed eight (more or less, 

 according to the size of boiler) circular hollow fire-bars, placed 

 at such a distance from one another as to allow sufficient space 

 for the draught. At the back or farther end of this casting 

 are the return pipes, and in the front the discharge pipe for 

 cleansing the interior of the boiler at any time. The ashpit is 

 formed by the brickwork supporting the first or basement casting, 

 and is enclosed by a door hung on a solid cast-iron frame built 

 into the brickwork or otherwise. The furnace-door is to be hung in 

 the same way. 



Upon the first casting four other separate hollow castings are 

 placed, of which Nos. 2 and 3, forming the sides of the furnace, are 

 fluted and placed parallel with the hollow fire-bars, and are of such 

 a length that the two remaining castings, Nos. 4 and 5, which form 

 respectively the back and front of the apparatus, may be flush with 

 the ends of the first casting. The back, or No. 4 casting, is large 

 enough to cover the whole or part of the end of the apparatus, and 

 is connected at the bottom by pipes with castings Nos. 2 and 3 

 respectively, and at the top on each side with casting No. 11, which 

 will be afterwards described. The front casting, No. 5, must be of 

 such a height that the top will be level with the top of No. 6, 

 forming the top of the furnace. The front is built up with brick- 

 work, with three sliding soot-doors to allow the flues to be properly 

 cleaned out. This front, or No. 5 casting, is connected at the 

 bottom by pipes with castings Nos. 2 and 3, and at the top on each 

 side with casting No. G. Upon the top of castings Nos. 2 aud 3 is 

 placed a sixth further and separate hollow fluted casting;, forming 

 the top of the furnace, having a space left at the back opening 

 upwards, to allow a free passage for the fire to pass out of the 

 furnace under a separate aud hollow casting (No. 7), which when 



