66 
REPORT—1904. 
Wawe-length Tables of the Spectra of the Elements and Compounds.— 
Report of the Committee consisting of Sir H. E. Roscor (Chairman), 
Dr. MarsHauu Watts (Secretary), Sir Norman Lockyer, Professor 
J. Dewar, Professor G. D. Livernc, Professor A. SCHUSTER, Pro- 
fessor W. N. HartLey, Professor WoLcotr Gipss, Sir W. DE W. 
ABNEY, and Dr. W. EH. ADENEY. 
RUTHENIUM. 
Kayser, ‘ Kénigl. Preuss. Akad, Wissensch. Berlin,’ 1897. 
Adeney, ‘ Proc. Royal Dublin Soe.’ vol. x. (n.s.), pt. 1, No. 3. 
Hixner and Haschek, ‘ Sitzungsber. kais. Akad. Wissensch. Wien,’ cv. 1896, cvi. 1897. 
Rowland and Tatnall, ‘ Astro.-phys. Journ.’ vol. iii. p. 288, 1896. 
Wave-length 
(Kayser) 
Are Spectrum 
Spark Spectrum 
Adeney | 
Exner and 
Haschek 
5887°371 
64830 
33°561 
33380 
28-580 
28235 
26:018 
15157 
04°461 
5792°382 
90-741 
82°720 
82-511 
74°533 
71°352 
68-066 
58°875 
56:980 
53°72 
52°163 
47°623 
46:131 
45°776 
40°710 
34°606 
30°122 
25°895 
24:975 
14391 
13-025 
02-522 
5699°741 
99-224 
96°526 
94-626 
93°190 
92-288 
88-990 
Intensity 
and - 
5 
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Character | 
| Reduction to 
Vacuum 
pete ieee 
A 
1:60) 46 
” ” 
1:59 | 4:7 
9 ’ 
33 ’ 
” 3 
7°? 3 
1°58 e 
” 9° 
” , 
” ”? 
” ” 
99 ” 
1:57 S 
39 3 
” >’ 
39 3 
99 > 
” 3° 
” ” 
> ” 
9 ” 
29 37> 
” ” 
1:56 55 
” 39 
° ” 
” ” 
“5 4:8 
99 ” 
1:55 i 
> 9 
9 99 
29 ” 
” 9 
” 99 
” > 
Oscillation 
Frequency 
in Vacuo 
16980°9 
170462 
171375 
38-0 
52:1 
53°1 
59°5 
91°7 
17223°4 
59°3 
64-2 
88:2 
88:8 
17312°7 
22°3 
321 
59°8 
66:1 
752 
80:0 
938 
98-2 
99:4. 
17414°7 
33'3 
46°7 
59°8 
62°6 
93°9 
99:1 
175313 
39°9 
41°5 
49°8 
55°6 
60°71 
62°8 
73°0 
