1895.] On the new Gas obtained from Uraninite. 



Table. 



117 



Lines photographed in the Spectra of Gases obtained from various 

 Minerals experimented upon up to May 6. 



U = lines noted frequently in the spectra of brdggerite. 

 H = lines photographed by Hale. 



chromosphere and chronicled by Young; those photographed during 

 the eclipse of 1893 with a 6-in. prismatic camera by Mr. Fowler, 

 and those photographed with the same instrument at Kensington in 

 some stars of Group III of my classification in the constellation of 

 Orion. 



This table carries the matter of the relation of the new gases to 

 solar and stellar phenomena much further than I ventured to suggest 

 in my second note. We appear to be in presence of the vera causa, 

 not of two or three, but of many of the lines which so far have been 

 classed as " unknown " by students both of solar and stellar chem- 

 istry, and, if this be confirmed, we are evidently in the presence of a 

 new order of gases of the highest importance to celestial chemistry, 

 though perhaps they may be of small practical value to chemists, 

 because their compounds and associated elements are for the most 

 part hidden deep in the earth's interior. 



The facts that all the old terrestrial gases, with the exception of 

 hydrogen, are spectroscopically invisible in the sun and stars though 

 they doubtless exist there and that these new gases, scarcely yet 



* The broad hydrogen line Hy extends over these positions. 



