ISOMORPHOUS DERIVATIVES OF BENZENE 



79 



real character of the relationship, which is appareutly of a less simple 

 character than that met with in the case of corresponding halogen deri- 

 vatives. 



On Wave-length Tables of the Sj^ectra of the Elements and Compounds. 

 — Report of the Committee^ consisting o/Sir H. E. ROSCOE (Chair- 

 man), Dr. 'Marshall Watts (Secretary), Sir J. N. Lockyer, Pro- 

 fessor J. Dewar, Professor G. D. Liveing, Professor A. Schuster, 

 Professor W. N. Hartley, Professor Wolcott Gibbs, and Captaiu 

 Sir W. DE W. Abney. 



Gold, Spark Spectrum, p, 79. 

 Manganese, Arc Spectrum, p. 89. 

 Silicon, Spark Spectrum, p. 96. 



Argon, Vacuum-tube Spectrum, p. 97. 

 Vanadium, Arc Spectrum, p. 100. 



Gold. 



Ultra-violet Spark Spectrum. 



Eder and Valenta, ' Denkschr. kaiserl. Akad. Wissensch. Wien,' Ixviii. 1899. 

 Bxner and Haschek, ' Sitzber, kaiserl. Akad. Wissensch. Wien,' evil. 1898. 



* Observed in the Arc-spectrum by Kayser and Range. 



t Wave-lengths enclosed within brackets are from Eder and Valenta's previous 

 list of 1896. 



4792-79, 4488-46, 37-44, 4241-99, 4084-26. 



