168 Agkicultubal Experiment Station, Ithaca, 1^. Y. 



SECOND TEST. 



Feb. 24, 125 pounds. Mar. 



26, 100 



26, 75 



27, 75 



28, 100 

 Mar. 1, 100 



2, 100 



3, 100 



4, 125 



5, 100 Total second steam test, 1825 



6, 75 Average per day, 101y\ 



THIRD TEST. 



Mar. 15, 100 pounds. Mar. 22, 100 pounds. 



23, 100 



24, 100 



Total third steam test, 1100 

 Average per day, 110 



Total coal consumption with steam, forty-seven days 4725 



Average per day 100|^ 



Total coal consumption, hot water, fifty-three days 5375 



Average per day 1^1 If 



Fluctuation. — The detail record of temperatures showed that the 

 fluctuations both with steam and hot water were unusually large. This 

 is largely owing to the small size of the plant and its inadaptability to 

 steam heating. The expansion tank was small and would sometimes 

 boil over, and reduce the amount of water so much that after cooling 

 somewhat, there would not be sufiicient water to fill the pipes, while 

 with steam the conditions were such that a uniform and satisf'actory 

 circulation could not be insured without a small amount of pressure, 

 which could not be maintained. 



Influence of pressure. — The effect of pressure can not be more forci- 

 bly shown than by giving the average temperature of all the ther- 

 mometers for the fifteen steam readings when the steam gauge showed 

 a pressure of 1 lb. or more, and comparing these with the general 



