HEATING BY HOT- WATER PIPES. 



169 



A 14-inch boiler from 150 to 250 feet of pipe, 

 and from 65 to 100 feet of pit. 



An 18-inch boiler from 300 to 400 feet of pipe, 

 and 150 feet of pit. 



A 24-inch boiler from 600 to 800 feet of pipe. 



And a 10-inch plain boiler 30 feet of pipe, and 

 from 1 2 to 20 feet of pit. If 3-inch pipe, one^ 

 third more. If 2-inch pipe, as much more. 



The above quantities are rough esti- 

 mates, which may be varied by enlarging 

 or contracting the fire, or by regulating 

 the fire door. It is possible to heat a 

 much larger quantity of pipe with the 

 boiler, but it would be at a great loss of fuel. 

 Garton and Jarvis* cylindrical horizontal 

 boiler — fig. 192, 



Fig. 195. 



Fig. 192, 



193, and 

 — This 

 er was 

 ginally 

 wrought 

 but has 



194. 

 boil* 

 ori- 

 of 

 iron, 

 since 



been made of 

 cast-iron to in- 

 sure durability, 

 and has been 

 fitted up in 

 Veitch's nurseries at Exeter, 

 where we had an opportunity of fully 

 examining both it and the one fol- 

 lowing, in June last, and found them 

 working well, 

 The interior and 

 exterior surfaces 

 are equally acted 

 upon by the fire, 

 rendering them 

 both powerful in 

 heating and eco- 

 nomical in the 

 consumption of 

 fuel. The figs, 

 exhibit'different 

 views of this boiler, fig. 192 showing 

 the perspective ; fig. 193 the end section; 

 and fig. 194 the section. 



Fig, 194, 



Fig. 197. 



VOL. I. 



_ — _^ 



i 





M 



■m )| 



Garton $ J ar- 

 ms double drum- 

 boiler — figs. 195 

 to 198. — This 

 boiler is also at 

 work in the spi- 

 rited establish- 

 ment above 

 mentioned, and 

 is considered by 

 Mr Jas. Veitch, 

 jun., to be equal 

 to the last, and 

 especially so in 

 small houses, 

 and that they 

 have been found 

 to be the best 

 boilers in their 

 establishment. 

 Fig. 196 is a 

 view of the door 

 and frame; fig. 

 197 the perspec- 

 tive; fig. 198 the 

 section; and fig. 

 199 is a section 

 of the door and 

 frame. 



Stephenson's 

 double cylindri- 

 cal boiler — figs. 

 199 and 200.— 

 This boiler is 

 somewhat differ- 

 ent from the 

 conical boiler of 

 the same firm. 

 In this the fuel 

 is supplied at the 

 top of the dome. 

 The chief advan- 

 tage, however, 

 which this boiler 

 has over the con- 

 ical is derived 

 from an inner cy- 

 lindrical boiler, 

 which presents 

 a larger extent 

 of surface to the 

 action of the fire, 

 and serves at the 

 same time as a 

 hopper to con- 

 tain a supply of 

 fuel. The inter- 



T 



