150 AMOUNT OF ALCOHOL TN WOE. 



The first point was easily examined. 20 cubic cen- 

 timetres of red wine, which contained 10*5 per cent, 

 alcohol was poured into a flask, and into another flask 

 of equal size water with 10 f 5 absolute alcohol was 

 put, a liquid therefore containing the same amount 

 of alcohol as existed in the wine. Thermometers 

 were then placed in these flasks, and the whole 

 were weighed. They were then plunged simul- 

 taneously into an oil bath, in which the temperature 

 was rising. The wine in the one flask boiled 10 

 seconds before the alcohol and water in the other. 

 After both had remained at boiling point one minute 

 they were immediately cooled and weighed. 



The loss in 20 cubic centimetres wine was T268 



Ditto in alcohol and water . . . . 1*280 

 Therefore in 20 CO, (that is, 19'5 grammes (300 grs.) 

 for the spirit, and 19*9 (306 grs.) for the wine), a 

 difference of 0*012, which gives a difference of six 

 parts by weight in 10000. 



This difference may, however, be neglected, if ex- 

 actly the same method of heating be employed, and 

 the same amount of time be used in bringing the 

 water to a boiling point, it being never allowed to 

 remain boiling more than a minute. I am now only 

 speaking of wine which, like that employed in this 

 experiment, contains 1*64 per cent, extract. 



It was necessary to examine the effect produced 

 upon the boiling temperature by the solid constituents 

 held in solution by wine. The quantity of solid con- 



