HEATING BY HOT WATER. 189 
A boiler called the ‘‘ Reliance” (Templeman’s patent) 
is shown in Fig. 130. This is really a form of the saddle, 
having a pair of return flues running, not through the 
crown but through the sides, on a level with and not above 
the furnace. This renders it a very shallow as well as 
powerful boiler, useful where a deep stoke-hole cannot be 
provided. This is a favourite boiler with the fruit growers 
in Guernsey and Jersey, and has proved a thoroughly 
useful and reliable article. It will heat up to about 
1,500ft. of 4in. piping with the best results. 
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Fic. 130. 
Another type of saddle boiler, known as the ‘‘Cruciform,” 
is shown in Fig. 134, on p. 194. 
The conical or ‘‘ Cyclops” boiler (see Fig. 181) is a 
vertical form of heater requiring to be set in brickwork. 
It consists of a cylindrical casting with a water-jacket all 
round and the furnace in the centre. It is fed from 
the top, and the flues are carried round the outside of the 
boiler, usually by means of mid-feathers, as shown in the 
illustration. Though a useful boiler for small to moderate 
