]^4 T- SAKURAT: DETERMTNATTOX OF THE TEMPERATURE 



The acetic acid was now made to boil in the flask H. Its vapour, 

 passing into the jacket jj, heated up the walls of the neck of the flask, 

 that is, of the steam chamber over the solution, then passed into the 

 condenser K, and collected in the receiver R. The flame under the 

 flask II wns so i-eo-ulated that the acetic ncid only sl(->w]y distilled ; in 

 this mnnnor, a stondy supply of v^ponr of almost constant temperature 

 could be readily mnintained in the jacket. The thermometer c rnpidly 

 rose to about 11 1° under the influence of the acetic acid vapour, whilst 

 the thermometer a more slowly rose, until ultimately it also showed 

 about the same temperature. 



The salt solution was next hen ted to boiling. The water in the 

 flask Ct, which had been kept nearly boiling, was then also made to 

 boil regularly, and a rapid current of steam was passed into the salt 

 solution boilinof in the flask F. The thermometer a now beo-an to 

 rise above that in the jacket, until it indicated the same temperature 

 ns that of the solution. The flame under the boiling solution Avns so 

 refï'ulated that the temperature of the latter sliould either remain 

 constant or rise xery slowly. The results obtained in one exjieriment 

 with a solution of calcium chloride are shown below. 



