#11 ilje gjctljotr l^bnptcb to €om- 



painitr it |)iiir ai Driiimirn ^sttllitling 



|j iititrlc-iisljcci ^n0inc.^. 



By JOHN W. I. HARVEY. 



Bead on Tuesday, February 15, 1887. 



T3EF0RE describing tJio motliod ndoptod in tin's case, 

 -L-' perhaps it will give you a clearer understanding of 

 l,li.o matter if I shortly state the conditions under which these 

 engines were working prior to their conversion, and more 

 especially as in the seai'ch after economy the history of those 

 engines is somewhat unique if not altogether exceptional ; 

 a;nd as I go on, you will have your attention directed to the 

 fa,ct of three separate classes of engines at work in the same 

 hull, viz., " jot condensing," " surface condensing," and " com- 

 pound," under almost identical conditions of "draught of 

 water," "displacement," "midship area," " propeller," etc., 

 from which probably wo may be able to draw some useful 

 conclusions as to the cost of motive power in steam vessels, 

 having I'cgai'd to the description of machinery employed. 



Now, gentlemen, I am aware that the object of onr meet- 

 ings here is our mutual advancement, but in order that you 

 may have a clear understanding of the several conditions 



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