ALCOHOL 



353 



the use of an alcoholometer, or by adding definite 

 volumes of water, according to the table given below. 



Table for Diluting Alcohol. 

 (From Bolles Lee.) 



Grade 





Original Grade 







Required. 























Per cent. 















90 per cent. 



80 per cent. 



75 per cent. 



70 per cent. 



30 per cent. 



80 



13-8 



_ 



_ 



_ 





75 



21-9 



7-2 



— 







— 



70 



31-0 



15*3 



7-6 



— 







60 



53-6 



35'4 



26-4 



17-5 







50 



847 



63-0 



52'4 



4 I-7 



— 



40 



130-8 



104-0 



907 



77'5 



25-5 



30 



206'2 



171-0 



153-6 



136-0 



67-4 



To use this table find in the upper horizontal row of 

 figures the percentage of the alcohol that it is desired 

 to dilute, and in the vertical row to the left the per- 

 centage of the alcohol it is desired to arrive at. Then 

 follow out the vertical and horizontal rows headed 

 respectively by these figures, and the figure printed at 

 the point of intersection of the two rows will show 

 how many volumes of water must be taken in order to 

 reduce 100 volumes of the original alcohol to the re- 

 quired grade. Thus, if it be required to manufacture 

 some 70 per cent, alcohol, starting with 90 per cent., 

 we find the figure 70 in the vertical column, and at 

 the point of intersection we read 31, showing that 31 

 volumes of water must be added to 100 volumes of 

 90 per cent, alcohol. 



A rougher method of diluting 90 per cent, alcohol is 

 as follows : Take a number of volumes of 90 per cent, 

 equal to the percentage desired, and add a number of 



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