300 



REPORT — 1895. 



Mercury (Line Spectrum). 

 Eder and Valenta: 'Denkschr., Wien,' Bd. Ixi. 1894. 



The lines given below all occur in the spectrum of a mercury vacuum-tube 

 strongly heated and excited by a powerful condensed spark. Those marked * occur 

 also on a tube on higher pressure (10 mm. to 1,000 mm.) between ISC^ C. and 1,000° C. 

 with the condensed spark. Those marked f occur in a highly exhausted tube between 

 15° C. and 80° C, with the spark without condenser. Those marked § occur in the 

 condensed spark between mercury electrodes at atmospheric pressure, and those 

 marked || occur in the arc-spectrum. 



** Probabl}'- double. ^ Observed also by Vogel, Wied. Ann. v. 500. 



