OF ARTS AND SCIENCES. 



183 



and weighing the residue after converting it to the sulphate, it was 

 found that one part of lithium chloride was held dissolved in the cold 

 in about fifteen parts of amyl alcohol, 10 cm.^ of the solution contain- 

 ing in the mean 0.66 grm. of the chloride. 



When aqueous solutions of sodium chloride or potassium chloride 

 are treated with amyl alcohol and boiled, the water disappears, as 

 before, leaving first a globule of the concentrated solution and finally 

 the crystalline salts. On continuing the boiling until a thermometer 

 dipped in the liquid indicates the temperature at which the alcohol 

 boils by itself, a slight additional precipitation, doubtless due to the 

 expulsion of the water retained by the alcohol up to this point, takes 

 place upon the walls of the containing vessel. The results of quanti- 

 tative tests of the solubility of sodium and potassium chlorides are 

 given in the following tables. The strength of the solutions of 

 sodium chloride and potassium chloride were determined by evaporat- 

 ing weighed portions iu a platinum crucible and drying at a tempera- 

 ture considerably below the melting point of the salt, and weighing. 

 The solution of lithium chloride was standardized by treating a 

 weighed portion with sulphuric acid in excess, evaporating, igniting 

 at red heat, and weighing. The standards were fixed by experiments 

 (1) to (9). 



To determine the solubility of sodium chloride and potassium chlo- 

 ride in amyl alcohol, portions of the test solutions were weighed out. 



