Vol. VI, No.. 9.] The Strength of Sulphuric Acid Solution. 473 



[N.S.] 



Density. 



1,206 



1,203 

 1,195 

 1,182 

 1,189 

 1,185 

 1,182 



Numerical values for the density. 



Temperature. 



Density. 



4-5° 



10° 



20° 



25-2° 



30° 



35° 



40° 



C 



1,192 



1,189 

 1,187 

 1,186 

 1,850 



% age Composition. 



22-22 

 2 1 05 

 20 00 

 1 9 Or. 

 100 00 



asfsaar 



I. ISO 



1.190 



A numerical example will probably best explain the 

 method of treating the curves. 



The object is to obtain graphically at any temperature 

 that value of the density which corresponds with the correct 

 percentage mixture of acid and water. Taking the correct 

 mixture to be 20%, and assuming the European temperature to 

 be 20°C. and the Indian temperature to be 30 C, 



