454 



PROCEEDINGS OF THE AMERICAN ACADEMY. 



examined the compressibility of mixtures of alcohol and water, but his 

 mixtures never contained more than 38 per cent of alcohol and his data 

 do not, therefore, throw sufficient light on the question which is here 

 being raised. Dupr^ and Page have also dealt with this question, but 

 the value for the compressibility of absolute alcohol given by them 

 seems to be in error, as is seen by comparing it with the value given 

 by Rontgen ^^ or with that given by Amagat, and this throws doubt on 

 their other data. Moreover, they pass by a single step from 100 per 

 cent to 90 per cent alcohol, and this leaves unexplored the precise 



TABLE XIV. 

 Compressibility of Mixtures of Alcohol and Water. 



region which is of importance here. I have, therefore, examined the 

 compressibility of certain mixtures of alcohol and water with the 

 results given in Table XIV. The last two values, which are of chief 

 importance to this work, completely confirm values obtained earlier in 

 this paper. (See p. 440.) The relation between the compressibiHty 

 and the per cent of alcohol in these mixtures is brought out in Curve 

 II, in which k X 10^ is plotted for ordinate and per cent of alcohol for 

 abscissa. 



The points on the curve marked with crosses are from the data of 



« w. A., 44, 1 (1891). 



