502 Dr. W. W. J. Nicol on the Vapour-pressures 

 Nonmagnetic Eoom. 



Mean date. 



No. of sets. 



Temp. F. 



M. 



H. 



1884. 

 February 18 



9 



6 



16 



11 

 17 

 10 



10 



22 







41-8 

 61-4 

 53-5 



50-7 

 604 



12,039 

 11,822 

 11,119 



11,092 

 11,034 

 10,876 . 



10,826 

 10,656 



•18044 

 •18075 

 •18020 



•18100 

 •18212 

 •18101 



•18025 

 •18078 



March 3 





1885. 



May 28 



October 24 



1886. 

 April 19 



September 24 





Laboratory. 



Mean date. 



No. of sets. 



Temp. F. 



M. 



H. 



1884. 



March 15 



April 8 



12 

 11 

 14 



16 



26 



9 



21 

 30 







42-7 

 52-6 

 60-1 



47-5 

 58-0 



11,767 

 11,620 

 11,121 



11,095 

 11,002 

 10,819 



10,805 

 10,661 



•17261 

 •17224 

 •17370 



•17333 

 •17456 

 •17446 



•17424 

 •17426 



September 18 



1885. 

 January 2 



May 6 



October 24 



1886. 

 April 15 . 



September 24 





LIX. On the Vapour-pressures of Water from Salt-Solutions. 

 By W. W. J. Nicol, M.A., D.Sc, F.R.S.E., Lecturer on 

 Chemistry, Mason College, Birmingham*. 



IN 1835 Legrandf published a paper on the effect of various 

 salts on the boiling-point of water in which they were 

 dissolved in varying proportions. The results he obtained 

 were exceedingly interesting, but in complete ; and the experi- 

 ments of WiillnerJ and others have done but little to extend 

 our knowledge of this branch of the wide subject of solution. 

 With the desire of arriving at some definite conclusion as 



* Communicated by the Author. 

 + Ann. de Chim. et Phys. lix. p. 423. 

 X Pogg. Ann. ex. p. 564. 



