DEDUCTION FKOM TTlK (JASEOtTM tflEOUY O*' 80LUTI0R '295 



each of his ex])eiiiiieiital t(Mii]K'iatuies, so as to form a saturated solu- 

 tion. Then from curves showinj^' tlie exi)ansiou of jiure water and 

 pure aniline (the latter drawn from Thorpe's data, Trans, ('linn. A'or., 

 1880) there were read the specitic volumes of these substances at each 

 of ^vlexeetrs temperatures; and from the combined inlbrmation thus 

 obtained, there was calculated the total volume of that (piautity of the 

 saturated solution at each temperature which contains 1 };ram of ani- 

 line. This is what 1 lia\ e already calle<l the specitic solution volume. 

 A slight error is involved by the fa<*t that the volume of a solution is 

 Dot exactly the sum of the volumes of its ingredi<'nts; but this error is 

 necessarily small — too small to afi'ect the general character of the curve 

 or the nature of the lesson to be learned from it. 



The specitic solution volumes of the aniline, calculated in this man- 

 ner, were found to be as follows: 



I aniliue. 



In water 

 lavcr. 



. 248 



These specific solution volumes are represented as abscissa' in Fig. 2, 

 with the temperatures as ordinates. For the sake of comparison, 1 



240 



230' 



?20 



210° 



Oc.C. 2-5 5 7 5 (0 12-5 '5 



Fig. 3. — Volume of alcohol (litguid and satiirati'd vapor) woif;liiii.u 1 iirain. 



have placed side by side witli it a specific volume and temperature 

 curve (Fig. 3) for pure alcohol and its saturated vapor, plotted from 



