378 



Scientific Proceedings, Royal Dublin Society. 



whiskey. The absolute alcohol factors are first obtained by dividing 

 the percentages by 100, thus : — 



Sherry, 

 Lager beer, 

 Whiskey, . 



21 - 100 = 0-21, 



5 ^ 100 = 0-05, 



51 -4- 100 = 0-61 ; 



and these factors are then multiplied by the quantities taken- 



Sherry, 

 Lager beer, 

 Whiskey, . 



2-5 x 0-21 = 0-525, 

 12-5 x 0-05 = 0-625, 

 2-5 x 0-51 = 1-275; 



thus giving a total of 2 - 425 fluid ounces of absolute alcohol. The 

 equivalents in either the proof spirit or the whiskey standard may 

 be similarly obtained. If objection be taken to the very slight 

 trouble involved in obtaining the factors, they will be found stated 

 to the third decimal place in the three last columns of the figure 

 table, which, like the coloured plate, is based upon the nearest 

 whole numbers in terms of absolute alcohol. Finally, the practical 

 deduction from the most generally useful of the above data may 

 be summed up as follows : — 



