( 437 ) 



Lithium. 



Principal series: A = 43480,13 ■<( = -{- 0,95182 ; /> = + 0,00722 



V' ass. series : A = 28581,8 ; (/ = + 1,998774; 6 = — 0,000822 



2°'i „ : A = 28581,8 ; r/ = + 1,59872 ; /> = — 0,00321 



S'-d „ ; A = 28581,8 ; .7. = + 1,95085 ; A = -f 0,00404 



Tlie associated series converge here evidently to one limit. 



The difterence of wave frequency between the limits of principal 

 and associated series is 43480,13^21581,8 = 14898,33. The wave 

 frequency of the 1^* line of the principal series is 14902,7. So the 

 formula satisfies the law of Rydberg-Schuster pretty well. 



PRINCIPAL SERIES. 



FIRST ASSOCIATED SERIES. 



