376 



Scientific Proceedings, Royal Dublin Society. 



The data from which the table has been constructed will be 

 found to coincide with those given by the best authorities, but, as 

 regards wines, have really been obtained in every instance from 

 the mean results of an extended series of original determinations. 



Eepresented in figures, they would stand thus : — 



Explanation and Application of the Table, Plate VIII. 

 The first column represents absolute alcohol, and is coloured red. 

 The third, 1 proof 'spirit (that is, alcohol of specific gravity, -920), and 



1 Column 2 represents what is commonly called rectified spirit, that is, spirit con- 

 taining 88 per cent, of absolute alcohol ; and its introduction, though not necessary for 

 other purposes of comparison, will be seen to have a not unimportant technical value. 



