ON WAVE-LENGTH TABLES OF THE SPECTRA OF THE ELEMENTS, 189 



Lanthanum. 



Exner and Haschek, ' SitzuDgsb. kais. Akad. Wiss. Wien ' cviii Abth lla 

 p. 1085. , . . . 



Exner and Haschek, ' Wellenlangen Tabellen der Bogenspektren der Elemente.' 



Kowland and Harrison, ' Astroph. J.' vii. p. 387 (1898). 



Lohse, ' Astroph. J.' vi. p. 106 (1897) ; 'Berlin Akad.' (1897) 



Wolff, ' Zs. wissensch. Phot.' iii. p. 395. 



Kellner, ' Das Lanthanspektrum,' Inaug. Diss. Bonn (1904) 



Kayser, ' Abh. Berl. Akad.' 



K — Observed also by Kellner. 

 Ky — Observed also by Kayser. 



