How to manage a Garden 



for small structures. The fuel should be coke, broken 

 small, and mixed with dusty coal. Some amount of ex- 

 perience will be needed with this as well as with other 

 boilers, to ascertain precisely how to regulate the damper 

 and ash box door, and how much coke to put on at night 

 to maintain a steady heat, and yet have a bright fire in the 

 morning. The ashes resulting from the fire should not be 

 thrown aside as useless, but if put out in the open for 

 some time to become well weathered and free from sulphur, 



FIG. 75 . 



Distribution of pipes. 

 P Pipes. V Valve. 



they will be found useful for a variety of purposes, such as 

 plunging pots, putting on stagings, &c. 



The hot-water pipes should be not less than four inches 

 in diameter, if efficient working is to be guaranteed. It is 

 essential that the supply tank (which should if possible be 

 fed automatically) be higher than the boiler and pipes, 

 that the pipes should rise gradually from the boiler to the 

 air pipe; that the air pipe (which is better than a tap) 

 should be carried to a greater height than the supply tank ; 

 that the flow pipe be at the top, and the return at the 

 bottom of the boiler. With these essential conditions, we 



have every possibility of an effective service. 

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