574 



LITERATURE. 



1) WiLDEE D. Bancroft and his pupils in Journ. of Physic. Chemistry 18; 

 213, 281, 762 (1914). 19; 310 (1915). 



2) Wilkinson, ibid. 13; 695 (1909). 



3) Katalinic, Zeitschr. f. Physik., 14: 14, (1923). 



4) J. LiFscHiTz, Helv. Ghira. Ada, 1; 472, (1917). 



5) J. LiFSCHiTZ u. 0. E. Kalberer, Zeitschr. f. physik. Chem. 102; 393, (1922). 



6) Wehnelt. Wied. Ann. 68; 233, (1899). 



7) Voller u. Walter, ibid. 539, (1899). 



8) W. V. Bolton, Zeitschr. f. Electrochem. 9; 913, (1903). 



9) H. N. Morse, Astrophys. Journ. 19; 162, (1904), 21; 223, (1905). 



10). A. GüNTHEK Schulze, numerous communications in the Annalen d. Physik. 



11) Riesenfeld u. Pfützer, Ber. 46; 3140, (1913). 



12) Lecoq de Boisbaudran, Spectres lumineux, (Paris 1874), compare also the 

 data given by Urbain, Introduction a l'étude de la Speclrochimie (Paris 1911). 



13) Zie H. Kayser, Handbuch der Spectroscopie. 



14) D. R. P. V. Siemens & Halske. 



15) Baborovsky, Zeitschr. f. Electrochem. 11; 474, (1905). 



Groningen. Anorganic and Physico- Chemical Laboratory 



of the State University. 



I 



