72 ELECTROCHEMICAL INVESTIGATION OF LIQUID AMALGAMS 



(10) It was found impossible to obtain satisfactory results with an 

 electrolyte containing tin in a quadrivalent condition, either as stannic 

 chloride or as sodium stannate. In this connection it was pointed out 

 that Cady must have had a two-phase amalgam in his tin cell, and that his 

 results with tin were illusory. 



( 1 1 ) The solubility of copper in mercury was found to be only 0.0024 

 per cent, and of iron 0.00134 per cent by weight, amounts too small to 

 give satisfactory electrochemical results. The results of Meyer upon 

 copper are shown to be without significance, because he imagined that he 

 used a much more concentrated solution, which must have been a mere 

 suspension of copper in mercury. 



(12) It is shown that since lithium is only soluble to the extent of 

 0.036 per cent by weight in mercury, the results of Cady upon lithium are 

 likewise questionable ; but more dilute solutions of lithium are shown 

 to behave in a general way as Cady's equation requires. No exact deter- 

 minations were made, because of the difficulty of finding a suitable electro- 

 lyte. 



(13) All the deviations from the simple concentration law were found 

 to decrease as dilution increases, so that upon reaching a concentration 

 of o.oi gram-atom per liter all the amalgams investigated behaved prac- 

 tically as ideal solutions. 



(14) The density of pure indium at 20 was found to be 7.28. 



(15) The densities of various liquid amalgams of thallium, indium, tin, 

 and lead were determined. 



