( 474 ) 



and 12794. The observation gave J8697,0(P. 3) and 12782,2 (P. 8). 

 The first line of the first subordinate series gives summational vibra- 

 tions with the lines of B.S. : 



(1 B. S.) + (1, 1 S.S.) = 21732,5 ;./, = 4601,4 ;„. = 4601,6 (S). 

 (2 B. S.) + (1, I S.S.) = 24207 h = 4131. This line is not sepa- 



i-ated from (3, 1 S.S.). 

 The lines of B.S. give a frequency difference: 



(2, B.S.) - (1, B.S.) = 7813,6 i) — 5348 M = 2465,6 ;^ = 40558 >„. 



H0461 

 f 40489 



(P. 10) 



Natrium; Just as for Li, the first line of the principal series 



h 

 13314.68 7510.5 

 13303.0 ' 7517.2 



^5896.16 

 ^5890.19 



\ 3303.07 

 ■^3302.47 



2852.91 



2680.46 

 2593.98 



2543.85 

 2512.23 



not observed 



18091.74 



18074.55 



20366.84 

 20329.65 



21590.6 



21573.4 



22350.3 

 22333.1 



22845.07 

 22827.87 



5527.3 



5532.75 



4916.0 

 4918.9 



4631.7 



4636.4 



4474.2 

 4447 . 7 



4377.2 

 4380.6 



^5527.1 (K. H.) 

 '^5528.2 (S.) 



S 5531.7 (K. H.) 

 / 5532.7 (S.) 



4914 (S.) 



4918.4 (S.) 



\ 4629.4 (K. H.) 

 (> 4625.5 (S.) 



H633.1 (K. H.) 

 M629.5 (S.) 



'4472.5 (S.) 

 J 4372 (S.) 



gives with the following one a differential series, which Lenard, 

 and also Konen and Hagenbach, Saunders observed as a series of 

 diffuse doublets with constant frequency difference. The preceding 

 table corresponds with the first for Li. 



This differential series with the first lines of the subordinate series 

 (just as for T^i) gives again rise to new difïerential vibrations 

 (doublets). The first line of the differential series is indicated by (1, D.S.) 



influence, as Ritz himself ol)seives p. 523 : " diese Seriën enlfernen sich alle 



nur wenig von A ; besonders bei Li. Xa ist dies der Fail, wahrend bei K, 



m 



Rb, Cs, die Beobachtungen zii ungenau sind, uni einige Sicherheit zu gewinnen". 



From observations in Th, Al, Za Cd, Mg and Ca spectra Paschex concludes that 



this combination of Ritz is not quite correct. Ann. d. Phys. 29, 1909, p. 040. 



') The ^" is of much importunce in these lines. 



