36 



Drs. Ramsay and Young on 



HoO 



2. Water and Etliyl Alcohol. n -L A . Temperatures of 



\j2n-Q\J 



water taken as correct, and made the ordinates. c— '0000962. 









Absolute temperatures of 









Alcohol. 



Pressures. 



Ratios. 



Smoothed 











ratios. 



Recalculated. 



Observed. 



10 



1-058 



10527 



2701 



269-25 



50 



10553 



1-0553 



295-0 



295-0 



100 



1-0559 



10567 



307-3 



307-5 



150 



1-0565 



1-0574 



315-0 



315-3 



200 



10580 



1-0580 



3210 



321-0 



300 



1-0579 



1-0589 



329-5 



329-8 



400 



10595 



1-0596 



336-0 



336-0 



500 



1-0604 



1-0602 



341-2 



341-1 



600 



1-0609 



1-0606 



345-55 



345-45 



700 



1-0619 



1-0610 



349-4 



349-25 



800 



1-0618 



1-0614 



352-8 



352-65 



900 



10624 



10617 



355-8 



355-6 



1000 



10626 



1-0620 



358-6 



358-4 



1500 



1-0633 



10632 



3698 



369-8 



2000 



1-0648 



10641 



378-25 



378-0 



3000 



1-0663 



1-0655 



390-9 



390-6 



5000 



1-0675 



1-0673 



408-4 



408-3 



10000 



1-0687 



10701 



435-15 



435-7 



15000 



1-0701 



10720 



452-7 



453-5 



20000 



1-0715 



10735 



466-2 



467-1 



The only noticeable differences between the observed and 

 recalculated temperatures are at the three highest pressures 

 and at 10 millim. With regard to the error at the low pres- 

 sure, it may be mentioned that a number of careful determi- 

 nations of the vapour-pressure of alcohol at low temperatures 

 were made by Ramsay and Young by the still method (see note 

 at end of paper) , and that their results differed slightly from 

 those of Regnault. At a pressure of 50 millim. the difference 

 was only o, 05, but at 10 millim. the absolute temperature 

 found by them was 270 o, 25, which is practically the same as 

 that recalculated by means of the equation 



R' = R + c(*'-0- 



