ON WAVE-LENGTH TABLES OF THE SPECTRA OF THE ELEMENTS. 
Wave-length 
Spark 
| Spectrum 
Intensity 
Character 
3626-4 
25°8 
24-7 
23:9 
23-4 
23:1 
22°6 
20°4 
19°6 
19-0 
18:6 
177 
17:0 
16°9 
16°2 
15°9 
15:3 
14:9 
14°4 
13°8 
and 
SSE | 
ee 
BE 
OB 
Ean eames SAG eee esa ag nr ae, Pens Fe RNS FAG Ft Ft feta td BFS PRD I 
MoLyYBDENUM—continued. 
281 
Reduction to 
Vacuum Oscillation 
Frequency 
in Vacuo 
