192 Agricultukal Expekime:<t Station, Ithaca, N. Y. 



CONCLUSIONS. 



The results obtained lead to the following conclusions whi(;h 

 are trae under these conditions, although some of them may not 

 be true universally: 



1. The temperatures of steam pipes averaged higher than those 

 of hot water pipes, thi'oughout the entire circuit for the entire 

 period of test. 



2. The higher the inside temperature in steam pipes the less is 

 the proportionate warming power of the pipes at a given point. 

 The heat is distributed over a greater length of pipe, and as 

 steam is ordinarily carried at a higher temperature than hot 

 water, it has a distinct advantage for heating long runs. 



3. AMien no pressure is indicated by the steam gauge, the dif- 

 ference between the temperatures of the riser and the return, is 

 greater with steam than with hot water. 



4. Under pressure, the difference is less with steam than with 

 hot water. 



5. There is less loss of heat in the steam risers than in the 

 hot-water risers, and this means that more heat, in the steam 

 ssytem, is carried to the farther end of the house and more is 

 spent in the returns as bottom heat. 



6. This relation is more uniform in the steam risers than in 

 the hot-water risers, giving much more even results with steam 

 than with hot water. 



7. When the fires are operative, the fluctuation in the tempera- 

 ture of the risers at any given point is much greater with hot 

 water than with steam. 



8. An increase in steam pressure raises the temperature of 

 the entire circuit, but the teny)erature does not rise uniformly 

 with the pressure. 



9. The first application of the pressure increases the tempera- 

 ture of the returns much more than that of the risers.' 



10. Steam is better than hot water for long and crooked circuits. 



11. Pressure is of great utility in increasing the rapidly of 

 circulation of steam, and in forcing it through long circuits and 

 over obstacles. 



