200 HASSACHrSETTS HQETICTXTTTR AT. SOCTETY. 



tfaoogfat the slowness with whidi large water pipes cool off when 

 the fijne goes oat an advantage, bat steam pipes get cool in fifteen 

 minates : and too have got to have a certain amoont of heat to 

 get steam. He makes cp the fire in his greenhonse at three o'clock, 

 and at seven leaves the draught slight! v open. Mr. Hill grows 

 cocnmbers in his house, and these require more heat than the 

 plants in the speakers greenhouse. 



George Hill said . that this was his first winter with his steam- 

 heating a{^>aratn5. ~ He looked at a neighbor's which was satis- 

 factonr, and pat in the same sized boiler. His house is one 

 handled and sixty-three feet by twenty, with the boiler at one end. 

 The steam flows in a two-inch pipe and returns in six pipes an inch 

 and a quarter each. He can get ap steam with wood in fifteen or 

 twenty minutes. Last December, when the thermometer was at 15° 

 below zero, he fired up at eleven P.M.. and gave no more fuel until 

 nine A.M.. and the temperature did not vary more than two or three 

 degrees from fifty, withoat any attention. This morning (which was 

 very cold for the season) the thermometer in this house was up to 

 sixty, and he had to open the windows and admit air. Nothing more 

 would be required until two or three P.M. In a cold morning the 

 coal is exhausted more than in mild weather, when the damper is 

 dosed. He uses a cast ircMi sectional boiler, under one pound 

 presBore. He thought it would not be long before we could run 

 a hoose from six to twenty-four hours by an automatic arrange- 

 ment. His house is on a side hilL, and he thinks of putting up 

 another. He might lose some beat up the chimney. With hot 

 water pipes, if the sun comes out, the large body of heat in the 

 water is wasted. 



Mr. Woodford saud that <^)ening the windows directly against 

 the pipes and letting in the air would cool off the pipes. 



Mr. Strong said that it is a very serious evil, when the sun 

 comes oat, to have a great body of hot water in the pipes. He 

 has felt that we extracted more of the caloric from the fuel in 

 famaees surrounded by water pipes than when steam is used ; 

 and thooght that with vertical boilers a great deal of the heat 

 went up the diimney. 



Coi. WHsoD said that the steam fire-engine is the most per- 

 fect generator of steam ; it will heat up in fire minutes. Mr. 

 Hill's boiler requires only fifteen minutes. Steam travels with 

 great r^idity. The speaker predicted that the coming boiler will 

 be small, with the amoont of water reduced to the minimum. 



