182 
REPORTS ON THE STATE OF SCIENCE. 
Ir1pIuM—continued. 
Are Spectrum 
Spark Spectrum 
Wave-length 
_ Intensity 
Kayser 
Exner and 
Haschek 
| and 
Character 
Exner and 
Haschek 
2242-80 
2247-7 
46:7 
45:5 
438 
42°6 
40°5 
38°7 
38°3 
38°1 
37°1 
36°3 
34:3 
34:0 
33°2 
32:0 
24-2 
20:6 
19°3 
18°9 
12°4 
11:2 
10-2 
08-7 
05:0 
2197°5 
96-1 
92-2 
90°3 
87:0 
78°5 
69°3 
52°6 
51:7 
Wave-length | 
and | 
Character A+ 
Intensity. ——— 
| Reduction to | 
| Vacuum 
Oscillation 
Frequency 
in Vacuo 
0°68 
=] 
