210 



SOLUTIONS OF SULPHURIC ACID, ETC. LINDSAY. 



drew the conclusion that acid or double sulphate was present in 

 solution. Also McKayf- has noticed the same for mixtures of 

 potassium and magnesium sulphates. 



In the case of more concentrated solutions of CuSO 4 and 

 H 2 S0 4) I have found the same result to hold. But from lack of 

 time I was unable to push this far. 



I give two of my measurements, showing the concentration 

 and density of the constituents, the density of the mixture, and 

 its departure from the mean value. 



t Trans. N. S. lust. Sci., 9, 348, 1897-98. 



