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Determination of the Temperature of Steam 

 arising from Boiling Salt Solutions. 



Joji Sakurai, F. C. S. 



Professor of Cliomlstry, Imperial University. 



Introduction. 



Although it is well kQO\Yn that the boiling point of a salt solution 

 is .'ilwnys higher than that of water under the same pressure, tlie tem- 

 perature of steam arising from sncli a solution has l)een the siihject of 

 much dispute, and, even at present, different (opinions seem to prevail 

 among cliemists and pliysicists. 



According to one set of observers, the temperature of steam arising 

 from a boiling salt solution is the same or nearly the same as that of 

 the solution : Gay-Lussac and Faraday, and, subseqnentl}^, AVuhner, 

 Mnofniis, and lYaimdler, rank amono- these. According' to the other, 

 it is the same or nearly the same as that coming from pure water 

 boiling imder the same pressure, whatever may be the temperature of 

 the boiling sohition : tliis is the view held by Rudberg and, to a 

 certain extent, by ]\[iiller. Experimental ]n'oofs are adduced on both 

 sides, but these, as I shall show, are none of them conclusive, and 

 establish, T think, neither the one view nor the other. 



The determination of the real temperature of steam arising from 

 a boiling salt solution presents many experimental difficulties ; for, 

 besides othei's to l)e mentioned later on, steam condenses upon the 

 bulb of the thermometer and also upon the sides of the vessel al)ove 



