HEATING. 9 



such as to render it impracticable to dig far down into the- 

 ground before reaching water, or to prevent a drain being, 

 put below the boiler, then the upright tubular form of 

 boilers is neither suitable nor safe ; for, in cases of floods 

 during winter, the water may rise and put out the fire, 

 unless the stoke-hole is made watertight, which may be a 

 troublesome and expensive process. We would, however, 

 by no means depreciate these boilers, for where depth can 

 be secured, and coke for fuel is within easy distance, we 

 look upon them as being of first-class merit. Then we 

 have cannon boilers, tubular boilers, common saddle-boilers,, 

 terminal saddle -boilers, and boilers that require no setting,, 

 the makers of all being able to give satisfactory reasons 

 why the partici:riar form they adopt is the very best extant. 

 That we have this diversity amongst boilers is no doubt a 

 great advantage, for one that may work admirably in one- 

 place may not, through some peculiarity of place or posi- 

 tion, be so thoroughly satisfactory in another; and, again,, 

 the fuel most readily available, and which may suit one 

 class of boiler, may not be so readily obtained in another 

 place, and, therefore, those who are so situated will natu- 

 rally have recourse to a boiler that will consume the fuel 

 they have for feeding it with. 



We have not thought it necessary to mention any other 

 system of heating than the ordinary one with hot-water 

 boiler and pipes, because no one builds smoke flues now; 

 and the other systems which are adopted apd spoken of in 

 various works we have never tried, and, therefore, cannot 

 speak of them practically. 



Having selected the boiler, the pipes will be the next con- 

 sideration. In regard to these, it is always true economy 

 to have plenty of heating surface in the house — that is to 

 say, a quantity which will give sufficient warmth with a 



B 3 



