116 



FLUORESCENCE OF THE URANYL SALTS. 



cated slightly different values for the various series. The C bands in 

 particular, which were a composite of what in these later studies we 

 have designated as C y and C w of the polarized spectrum, were found 

 to have an unquestionably smaller interval than the other series of the 

 group. 



It will be seen from table 37 that this is true for both C g and C w in 

 the case of all four salts at +20 and that with the possible exception 

 of A w , which is an exceedingly feeble component, visible only in two 

 of the salts and very difficult of determination; all other series are very 



ie|oo 



I9|00 



20JOO 



2||00 



GREEN +20 



URANYL POTASSIUM CHLORIDE 



c d, e a, c A e a, c 



unAflTL. rulA33IUM V, 



TTTt t Mt 



aREEN-!85 



. 



I I 1 1 i I I 1 1 I I I I T 



WHITE 4-20 



.'if r i i " 



in i i MM ii 



e ba, c f ba c 



WHITE 



-tSS'l I I I I I I I I I I I ' I 111 



GREEN 420 



URANYL AMMONIUM CHLORIDE 

 C D E A CDEA 



_| I || cdeac&eac 



GREEN -185 || | | 



WHITE 4-20 



E B C E A B 



I I I I II 



e ba. c 



ba, 



WHITE -.85-1 I I I II I I IM 



1 1 1 



GREEN f 20 



CDEA 



I M 



TTn II 



1 , c d e a, c d ea c 



URANYL RUBIDIUM CHLORIDE 

 EA C D EA 



GREEN-185'I I I I I I I I I I I M I 



II 







WHITE -f 20 



E A B C E A B 



I I I I I I 



e ah c e ab 



WHITE -185 



8REENo 



URANYL CAESIUM CHLORIDE 

 BCDEABCDEA 



c | | | || I I 1 II 



1 1 1 1 1 



bcdeabcdeabc 



GREEN -185 



WHITE 4-20 



I II II I II I I I I I III I I II 



1 1 rn n ~i i" 1 " 



f 9 E A B C E A I I III II I I 



b c e ab c e ab 



WHITE -185 



1 III III 



18 100 



oloo 



1 



20JOO 



2IJOO 



Fia. 75. 



nearly of the same interval, not only in the same salt but in all the salts. 

 When, however, we make further averages of the average intervals from 

 table 37, taking the mean of all green components of fluorescence, 

 then of all white components, for each salt separately, and do the same 

 for the absorption intervals, we find an approach to systematic arrange- 

 ment which is suggestive if not altogether conclusive. (See table 37.) 

 Both components of the fluorescence spectrum show an average 

 interval in the inverse order of the molecular weights, and while the 

 absorption series do not give so decisive an indication the salts of lesser 



