the Expansion of Liquids by Heat. 



237 



They have been reduced to the unit of minimum volume by 

 means of Hallstrom's value of the expansion between 4°-l 

 and 30', and the coefficient of expansion of glass already 

 mentioned. 



In the fifth column of the table of comparison for mercury 

 it is stated which of the experimental results were taken 

 from M. Kegnaulfs own measurements on the curve, repre- 

 senting the mean results of his experiments, and which from 

 his tables of actual experiments, distinguishing the series. 



In the experimental results for alcohol and sulphuret of 

 carbon, the respective units of volume are the volumes of 

 those liquids at their boiling points, and the volumes given 

 by the formula have been reduced to the same units. 



Expansion of Water. 



VOL. XLVII. NO. XCIV. — OCTOBER 1849. 



