Reduction to 
Vacuum 
242 REPORTS ON THE STATE OF SCIENCE, 
RuoDIUM—continued. 
Arc Spectrum Spark Spectrum 
| Wave-length Inten-| Wave- | Inten 
— —-- sity length sity 
| Rowland Exner a Ot ——— 
Kayser an | and Cha- | Exner and Cha- 
Tatnall | Haschek | racter | Haschek | racter 
| 3352°0 1 
| 516 1 
51-2 1 
Bt Ae 
| 50°7 | 1 
50°5 | 1 
| 501 1 
498 | 1 
) 496 | 1 
| 49-1 | l 
49:0 1 
48°4 1 
48:1 1 
47°8 1 
3347°660 0 
47-437 1 47:1 1 
| 46°9 1 
| 4677") Ul 
| 46-2 | In 
3346-071 1 46:1 | 1 
45-707 4 | 
45°156 10 | 
445 | 2 
44°337 | 44-340 | 3344°34 5 ) 
43°573 | 43°55 | 2 | 
43-2 | 2 
43-036 43°039 43°05 5 
2D i | 
420 | 1 
41°2 1 
40°987 0 
40°8 In 
38-672 38°687 38°69 i 38:7 | 4 
36°842 36°85 0 36°9 4 
35°328 0 
32°648 | 32°66 | 1 
31°393 | 31°381 31-42 4 31:4 2 
31-233 31-230 31:26 4 
26:0 1 
23°232 23°228 23°24 6r 23°3b | 8 
20:0 1 
18°5 1 
16°670 0 
14-665 14:67 | 2 14:7 In 
13-2 In 
10°7 In 
09°663 09°67 2 09:7 In 
d 08-2 1 
08:067 08-06 3 
07-474 07:47 0 07:5¢ 4 
07:091 07:10 | -1 
05°5 1 
05-298 05°30 4 05:3 1 
QO £258 04:25 2 04:2 1 
0°94 | 85 
Oscillation 
Frequency, 
in Vacuo 
