CONCBNTEATION OP SALT SOLUTIONS. 



25 



Zixc Sulphate. — ZnSO,. 



Observer : The author. 



Temperature : 20° C. 



Formula: !>,„= 0'99827 + 0-010391S p. 



The above formula thus gives the densities of solutions of Zinc Sulphate accurately 

 to four places of decimals, provided they do not contain more than about 3 per cent, of 

 anhydrous salt in solution. 



Magnesium Sulphate. — MgSO,. 



Obserrer : The author. 



Temperature : 20°C. 



Formula : D,o = 0-99827 + 0-0106324 p. 



The formula is thus applicable up to about 2 per cent. The following is another 

 series of observations of solutions of the same salt : — 



Observer : Schifl". ' 



Temperature: 23°C. 



Formula: Djj = 0-99762 + 0-0098176 p. 



Ann. Chem. u. Pharm. cviii, p. 336 ; see also Watts' Dictionary of Chemistry, Art. Magnesium Sulphate. 



Sec. Ill, 1889. 4. 



