Report of the Committee on Steam Boilers. g^ 



Steaming Economy Percentage of 



capacity. of fuel. economical 



effect. 



Boot No. 4 No. 2 0.709 



Allen.. " 1 "3 0.707 



Phleger " 3 " 4 0.699 



Lowe "2 "5 0.693 



Blanchard "5 "1 0.756 



The results obtained, as above, and other very useful determina- 

 tions derived from this extremely interesting trial, are given in the 

 following table, which the Committee hope and anticipate may be 

 found, by all who are interested in the subject, to be of very great 

 value as a reliable record of the trial of several excellent steam 

 boilers, as a valuable standard set of data with which to compare the 

 results of future trials, and as a useful aid in judging of the accuracy 

 of statements made by boiler venders in the endeavor to effect sales 

 by presenting extravagant claims of economy in fuel. 



The Committee regret that the log of the trial of the Blanchard 

 boiler was carelessly kept, but they believe that the method adopted 

 afforded such a perfect system of checks that no appreciable error 

 was introduced. 



They desire to express their appreciation of the neatness and effi- 

 ciency of the arrangement by which provision is made, in the Lowe 

 boiler, for complete combustion of the furnace gases, and of the excel- 

 lent general arrangement and proportions which gave to the Allen 

 boiler its remarkably high steaming capacity. 



As some authorities consider the evaporation of one cubic foot per 

 hour to be the equivalent of one horse-power, column Z is introduced 

 to give the area of heating surface required in each boiler, per horse- 

 power, on this basis. A good, modern steam engine ought not to 

 require more than one-half the specified amount. 



[Inst.] 6 



