5-] 



AND HORTICULTURIST. 



103 



which were heated by steam, I determined to visit 

 them. I found the proprietor far from being per- 

 fectly satisfied, and again my ardor was dampened. 

 I had read in the Gardeners' Monthly the ad- 

 vertisement of the Exeter Heating Apparatus, and 

 upon writing to the company I received from them 

 such information as decided me to go to Boston 

 and see one of their boilers in operation. 1 felt I 

 had found the right thing ; indeed, so much was I 



slightly, the lever falls and opens the draft. In 

 safety appliances there are a safety valve and 

 safety plate. 



From the upper drums (spoken of in the descrip- 

 tion of the boiler) start the steam main, which 

 is perpendicular for twelve feet, and then branches 

 off and runs through both of the sheds ; — the pipe 

 always growing smaller the farther it gets away 

 from the boiler ; at the center of each house this 



Fig.n. 



rw^Q'^- 



FiG. 2 rihows a coil with maiiifold.s on each end, and the drip taken from one of them. The letter A represents an air valve. 



pleased that before I left Boston I bargained with 1 pipe is tapped and the coils run in the houses. I 



them to heat my ten houses. have a drawing of a coil. These coils have a fall 



I will now give a description of my boiler. The \ of nine inches in every one hundred feet, so that 



Exeter heating boiler consists of a series of sections 

 rectangular in form, two feet long, two and a half 

 feet high, three and a half inches thick. Each 

 section is cast with eight openings through it two 

 inches by twelve inches. These sections being 



all condensed steam runs to the lower end, where 

 a drip is taken out of the bottom of the manifold 

 (this drip also having a fall of nine inches to one 

 hundred feet) and runs into a main drip which 

 runs the entire length of the shed; it is under- 



arranged over the fire two inches apart, trans- 1 ground, and has a fall of two feet towards the 

 versely to the draft, the openings form fire tubes boiler. In my five houses, 22 feet by an average 

 (although not continuous, as the spaces between ; 115 feet, there are 16,445 cubic feet each, or 82,225 



the sections unite them into 

 one space), and increase' the 

 heating surface, while their 

 >valls tie the flat sides of the 

 sections together. 



Every angle is rounded 

 inside and out, and the bot- 

 tom and top faces of each 

 section have wave-like 

 forms, to permit expansion 

 and contraction. The lower 

 and upper parts of each sec- 

 tion are connected by an 

 extra heavy pipe, extending 

 through the v/all of the set- 

 ting to a main outside drum 



O 



o 



r-\ 



A 



A 



-also 



Y\G. 3 shows a front view of section- 

 showing the tine pipes formed, AA.\. 



Fig. 4 shows an end view of section, showing 

 openings into which the pipes rnnning Into the 

 water and steam drums are. 



cubic feet of air in all to be 

 heated. These houses each 

 have about 1,000 feet of i^ 

 inch pipe. In my other five 

 houses — three 12x96 and 

 two 18x96 — there are 50,976 

 cubic feet of air to be heated, 

 and there are about 3,000 

 feet of one-inch pipe ; so that 

 in all we have 133,201 cubic 

 feet of space to heat and 

 5,000 feet of \){ inch and 

 3,000 feet of inch pipe do it 

 admirably. Before speaking 

 of the advantages gained 

 like to say that each feed 

 coil has a valve on it ; 



common to all. by steam I would 



There is an automatic damper regulator which which supplies the 



is attached to the boiler, and operated by the each drip has a valve ; each coil has an autom 

 steam it can be adjusted' to any desired pressure 



(say two pounds in cold weather), and when the 

 steam reaches that pressure it immediately acts on 

 the automatic regulator, shutting the draft door 



atic air valve, and upon each end of the coil is a 

 manifold which is so arranged with a system 

 of valves that I can use as many pipes as the 

 weather makes necessary. The advantages of 



and closing the damper in the pipe leading to the steam as they occur to me : (i) The pipes certainly 

 chimney, thus checking the fire and preventing do not occupy one-fourth of the space demanded 

 an increase of steam. As the pressure decreases by hot water pipes ; they are usually against the 



