ON WAVE-LENGTH TABLES OF THE SPECTRA OF THE ELEMENTS. 193 



Report of the Committee, consisting of Sir H. E. Eoscoe, Dr. 

 Marshall Watts, Mr. J. N. Lockyer, Professors Dewar, 

 LivEiNG, Schuster, W. N. Hartley, and Wolcott Gibbs, aoid 

 Captain Abney, on Wave-length Tables of the Spectra of the 

 Elements and Compounds. {Drawn up by Dr. Marshall 

 Watts.) 



Lithium. 

 Kayser and Range (' Ueber die Spectren der Elemente.' Berlin, 1890). 



Wave- 

 length 

 (Rowland) 



6708-2 

 6103-77 

 4972-11 

 4602-37 

 4273-44 

 4132-44 

 3985-94 

 3915-2 

 8838-3 

 8794-9 

 8718-9 

 8670-6 

 3232-77 

 2741-39 

 2562-60 

 2475-13 

 2425-65 

 2394-54 

 *(2373-9) 

 *(2359-4) 



Previou^s Measurements 

 (AngPtrbm) 



6706-7 Thalen 



6102-2 „ 



4971-2 „ 



4602-2 „ 



4273-3 „ 



4131-7 Liveing & Dewar 



3984-5 



3913-5 



3838- ? 



3799-0 



8232-0 

 2741-0 

 2567-5 

 2475-0 

 2425-5 

 2394-5 

 2373-5 

 23590 



Reduction to 

 Vacuum 



A.-I- 



1-96 

 1-80 

 1-47 

 1-37 

 1-28 

 1-24 

 1-20 

 1-18 

 1-15 

 1-14 

 1-12 

 1-11 

 0-99 

 0-85 

 0-80 

 0-78 

 0-77 

 0-76 

 0-75 

 0-75 



4-4 



4-8 



5-9 



6-5 



70 



7-2 



7-6 



7-7 



7-8 



7-9 



8-1 



8-2 



9-5 



11-4 



12-3 



12-7 



13-1 



13-2 



13-4 



18-5 



Oscillation 



Frequency 



in Vacuo 



14902-7 

 16378-5 

 20106-3 

 21721-4 

 23393-3 

 24191-6 

 25080-6 

 25533-8 

 26045-4 

 20343-3 

 26881-5 

 27235-3 

 30923-7 

 36466-4 

 39010 6 

 40389-2 

 41214-7 

 41748-5 

 42111-4 

 42370-2 



Sodium. 



Kayser and Kunge (' Ueber die Spectren der Elemente.' Berlin, 1890). 



Wave-lenpth 

 (Rowland) 



*(8200-3) 

 *(8188-3) 

 6161-15) 

 6154-62) 

 5896-16) 

 5890-19) 

 5688-26 > 

 5682-90 r 

 5675-92 , 

 5670-401 

 1892. 



Previous 

 Measurements 

 (Angstrom) 



8199 Abney 



8187 „ 



6160-2 Thalen 



6154-4 



5895-13 



5889-12 



5687-3 



5681-5 



5674-4 



5668-0 



Fraunhofer 



Lines in 



Rowland's 



Map 



absent 

 absent 



6161-50 ? 



6154-49 ? 



5896- D. 



5890-19 , 



5688-42 ? 



5682-58 ? 



5675-90 ? 

 absent 



Oscillation 

 Frequency 

 in Vacuo 



12197 7 

 12215 7 

 (16225-9 

 1 16242-2 

 , 16955-2 

 116972-4 

 ( 17574-9 

 1 17587-4 

 r 17613-1 

 1 17680-2 



