364 Prof. W. Ramsay and N. Eumorfopoulos on the 



Salts of Lithium. 



The lithium carbonate bought as pure gave a conspicuous 

 sodium coloration to the Bunsen flame. It was purified 

 by successive precipitation and washing, until it gave a 

 brilliant carmine coloration to a Bunsen flame, free from 

 yellow fringe, showing an absence of sodium. The melting- 

 points are not very well marked as a rule. 



Earn say & 

 Eumorfopoulos. Carnelley. Le Chatelier. 



Li 2 S0 4 853 818 830 



Li 2 C0 3 618 695 710 



LiCl 491 598 



LiBr 442 547 



Lil below 330 446 



It will be noticed that there is here no agreement between 

 the results of different observers. Our results are as a rule 

 about 100 degrees lower than Oarnelley's, except that of the 

 sulphate. Our resistances did not allow us to take the 

 melting-point of lithium iodide, as we had not arranged for 

 temperatures below 330°, but its melting-point is below that 

 of potassium nitrate (339°). Lithium iodide is very hygro- 

 scopic, so that on placing it on the ribbon it quickly liquefies; 

 then on putting on the current, it becomes solid and then 

 liquid again at the temperature given above, i, e., it has 

 melted, and remains so indefinitely. 



Salts of Sodium. 



The salts of sodium and potassium were prepared from the 

 bicarbonate, precipitated by carbonic acid from a solution of 

 the pure carbonate. The melting-points are well marked, 

 though all are not equally so, e. g., the iodides. 



Meyer, 



Bamsay & Le Clia- Kiddle Heycock & 



Eumorfopoulos. Carnelley. telier. & Lamb. Neville. McCrae. 



Na Q S0 4 ... 884 861 860 863 883 883 



Na 2 C0 3 ... 851 814 820 849 852 861 (854) 



NaCl 792 772 778 815 ... 813 



NaBr 733 708 ... 758 ... 761 



Nal 603 628 ... 661 - 695(668) 



The agreement between Messrs. Heycock and Neville's 

 results and our own is only apparent, as they find 1062° as 

 the melting-point of gold, while we assume 1045°. The fact 

 that they are determining freezing- and not melting-points 

 may introduce some difference. 



