PHYSICAL CONSTANTS OF SATURATED SOLUTIONS. 

 SODIUM Sulphate. 



209 



VII. 

 Solubility, 



from 



COMEY'S 



dictionary. 



5-0 



9-18 



14-12 



27-6 

 34-1 

 41-8 

 47-6 

 50-5 

 49-3 

 47-7 

 45-3 

 44-0 

 43 1 



42-3 



Most of the solubilities were determined by evaporating to dryness in platinum 

 crucibles, the remainder in Jena glass bulbs. On plotting out the results of the 

 density and solubility determinations against the temperatures, it will be seen that 

 both curves give the transition point at 32'5. The direct estimation of the melting- 

 point of hydrated sodium sulphate made by Messrs. RICHARDS and CHURCHILL* gave 

 32'379 on the hydrogen scale. 



POTASSIUM Sulphate. 



The solubilities were determined by evaporating in platinum crucibles, those at the 

 boiling-point in Jena glass bulbs. 



* ' Zeit. Phys. Chem.,' 26, 690 (1898). 



t Reduced to the temperatures in column I., from ANDRIA'S solubilities, see ' J. Prakt. Chem.,' 137, 471. 



VOL. CCIII. A. 2 E 



