194 



PROCEEDINGS OF THE AMERICAN ACADEMY 



scribed, excepting only the substitutiou of pure calcium oxide, specially- 

 prepared, for magaesium oxide. 



From these results it is plaiu that it is a far more difficult matter 

 to dehydrate and dissolve calcium chloride than either magnesium 

 chloride or lithium chloride. The separation of the chlorides of 

 sodium and potassium from calcium chloride cannot be accomplished, 

 for the quantities employed in these experiments, by a single precipi- 

 tation; but the repetition of the treatment is effective. In the residues 

 of experiments (46) and (47) calcium could not be found by the test 

 with ammonium oxalate. In a case, therefore, in which the separa- 

 tion of sodium and potassium from lithium, magnesium, and calcium 

 in one operation should be desirable, the end may probably be accom- 

 plished by means of the process here described. 



Certain preliminary experiments with the nitrates of the bases under 

 discussion indicate that tliese are susceptible of similar separation by 

 the action of amyl alcohol ; and the wide applicability in analytical 

 operations of the general principle involved, — the dehydrating of salts 

 by means of amyl alcohol or other liquid of high boiling-point and 

 appropriate solvent action, — can scarcely be a matter of doubt. 



