155 



A convenient table of results estimated from the curves is here given: 



The information here given enables one to determine cjuickly the approxi- 

 mate concentration of any alcohol-water mixture bj' observation of its boil- 

 ing point, with corrections for barometric pressure and exposed mercury 

 column. The accuracy is, of course, less than by the usual and more difficult 

 analytical method of distillation and the determination of the gravity- of the 

 distillate with a pyknometer. 



