204 



REPORTS ON THE STATE OF SCIENCE. 



Palladium. 



Kayser, ' Astropliys. Jour.,' vii. p. 99, 1898. 



Rowland and Tatnall, ' Astrophys. Jour.,' iii. p. 291, 1896. 



Exner and Haschek, ' Sitzber. kaiserl. Akad. Wissensch, Wien,' civ. (2), p. 950, 

 1893; ev. (2), p. 533, 1896; cvi. (2), p. 45, 1897. 



Adeney, ' Roy. Dublin Soc. Trans.,' vii. p. 331, 1901, 



Lohse, ' Publ. Potsdam Obs.,' xii. (3), No. 41, 1902. 



Exner and Haschek, ' Wellen-lilngen-Tabellen . . . der ultravioletten Bogen- 

 spektren der Elemente,' Leipzig 1904, p. 116, 



The lines marked A are distinctly recorded in Adeney's photograph of the spark 

 spectrum. 



