2 ART. 16. — M. OGAWA : 



hydrochloric acid but soluble in hot nitric acid, and its solubility 

 in ammonium carbonate to form a deep brown solution, are 

 likewise produced by the element now to be described. The 

 formation of a golden-brown syrup on evaporation of a nitric acid 

 solution of the sulphide, which she appears to regard as another 

 characteristic of her element, could, however, in the case of the 

 element forming the subject of this paper, be observed only with 

 the impure sulphide, which, in some form or other, was found 

 to contain a small quantity of iron, besides, perhaps, some other 

 elements. Again, on reducing with hydrogen, the oxide prepared 

 from such sulphide, produced a metal, which, in agreement with 

 Miss Evans' observation, was fusible at a bright red heat, but 

 the metal obtained from the purified oxide was found to be non- 

 fusible. It appears, therefore, that, if Miss Evans' element is 

 really identical with mine, I have got it in a much purer state. 

 In any case, it is unfortunate that, in consequence of her account 

 being much too short, no exact comparison can be instituted 

 between the two. It is also unfortunate that, in spite of her 

 positive statement as to the existence of molybdenum in thoria- 

 nite, she does not tell us how this element has been completely 

 removed, the sulphide of molybdenum also dissolving in ammonium 

 carbonate to form a deep brown solution. 



There is one other point, which should be noted before 

 going further. Miss Evans says that the sulphide of her element 

 is soluble in water. The solubility of the sulphide, upon which 

 I worked, may be inferred from the fact that one of its 

 sources was the sulphide residue from thorianite, which had 

 escaped precipitation by hydrogen sulphide (p. 10), and also 

 from the fact that a solution of the purified oxide in ammonia 

 Avas almost completely precipitated by hydrogen sulphide, only 



