NOTE ON A NEW ELEMENT IN THORIANITE. O- 



chloride, became deep green on being moistened with water and 

 dissolved into a pale green solution on the addition of more 

 water, acidified with nitric acid. A portion of the solution was 

 tested for thorium with negative results. 



Equivalent iveight. (1) A known weight of the chloride, 

 prepared as above and contained in a small tube, was dissolved 

 in acidified water, precipitated by ammonia, and the precipitate 

 was ignited and weighed as oxide. 0.1092 gr. of the chloride 

 gave 0.0742 gr. of the oxide, from which the number 50.3 

 was calculated as the équivalant weight of the element. (2) 

 The oxide was fused with hydrogen potassium sulphate, dissolved 

 in water, and precipitated by ammonia. This precipitate was 

 dissolved in dilute sulphuric acid, the solution evaporated to 

 dryness and heated over a sulphur bath, until the weight 

 became constant. The residue was ignited and weighed as oxide. 

 0.1253 gr. of the sulphate gave 0.0747 gr. of the oxide, again 

 leading to the value 50.3. (3) The chloride, of which 0.0652 gr. 

 was taken, was dissolved in water, acidified with nitric acid, 

 and precipitated by silver nitrate, which gave 0.1120 gr, of 

 silver chloride, whence follows the number 48 as the equivalent 

 weight of the element. 



Judging from the mode of working, the properties of the 

 oxide and the chloride, as well as from the equivalent weight, 

 the element in question must be considered as hitherto unknown, 

 and this view has been further confirmed by 



Spectroscopic examinations. The oxide was fused with sodium 

 carbonate and potassium nitrate, the fused mass dissolved in 

 water, and the brown precipitate obtained by passing a current 

 of carbonic acid through the solution, was dissolved in dilute 

 hydrochloric acid and subjected to spectroscopic examinations. 



