ON WAVE-LENGTH TABLES OF THE SPECTRA OF THE ELEMENTS. 273 
Wave-length Tables of the Spectra of the Elements and Compounds.— 
Report of the Committee, consisting of Sir H. EH. Roscoe (Chairman), 
Dr. Marswatt Warts (Secretary), Professors J. N. Lockyer, 
J. Dewar, G. D. Livetnc, A. Scnuster, W. N. Hartiey, and 
Wotcorrt Grpps, and Captain ABNEY. (Drawn up by Dr. Watts.) 
Arcon (Vacuum TuBe). 
Eder and Valenta: ‘ Anzeiger Wien. Akad.,’ xxi. (1895). 
‘Sitz. d.k. Akad. d. W. Wien,’ civ. (1895). 
* Denkschr., d. k. Akad. d. W. Wien,’ lxiv. (1896). 
Kayser : “Astroph. J.’ iv. i. (1896) ; ‘Sitz. Akad. W. Berlin,’ xxiv. (1896). 
: Crookes : ‘Chem. News,’ lxxi. 58 (1895). 
* Common to both ‘red’ and ‘ blue’ spectra. 
+ A constituent of the third or ‘ white’ spectrum of argon. 
|| Belongs to Mercury. 
” ” 
RED SPECTRUM OF ARGON. 
Reduction to ‘ 
Wave-length t saben 
: Ir , Previous eae eae 
: avec Rare | ntensity Observations a 1 eae 
(a) Valenta (b) Ne 
7723°4 2 2:09 3°5 129421 
7635°6 2 7646 Crookes | 2:06 3 13093-0 
T5151 2 2-04 3°6 13302°9 
75034 2 7506 re 2:03 5 13323°2 
7383°9 2 73717 7 2-01 37 13539°3 
7271°6 1 7263 3 1:97 3 13748°4 
f 7146°8 L 1:95 3°8 139895 
7066°6 qT 7056°4 af 1:92 ‘ 14147°3 
7029°2 1 1:91 5 14222°6 
6964°8 8 6965°6 oP 1:89 39 14354:0 
6937°8 i 188 es 14409°9 
‘ 6870°6 1 1°86 = 14550°8 
6786°5 it 184 | 40 147311 
6752°7 3 6754 55 1°83 = 14804°9 
| 6676°5 3 6664 59 1:81 + 149747 
6415°2 5 6407 # 1-74 4:2 15583°8 
6384:5 2 63772 3 a “4 15658°7 
6368-0 1 1-73 = 15699°3 
6307°8 1 1:72 43 15849°1 
6296°8 2 6302? 3 171 3 15876'8 
*6§217°5 1 1:69 4-4 16079°2 
' 6212°5 2 6210 Fe we hs 16092°2 
*6172°9 2 6173 Pr 168 aA 1619574 
6170°3 1 3 iy 16202°3 
6155-2 1 Pe “5 16242:0a 
6145-6 2 6143 3 1:67 iy 16267°3a 
6106-1 2 6099 7 166 Ws 16372°7a 
| 6098-8 1 es mi 16392:3a 
6059°5 4 6056 53 165 | 45 | 16498-5¢ 
| 6052-7 2 files ert 16517:1a 
6043-0 6043-68 4 6045 a Seb 16541:7) 
/ 6031°5 6032-69* 5 6038 ” | L64 . 16571°8) 
'  =©60258 1 ge » | 16590-8a 
1896. : 
