REPORTS ON THE STATE OF SCIENCE. 
IR1IDIUM—continued, 
Are Spectrum 
Spark Spectrum 
Wavye-length 
Wave-length 
a “eer Intensity 
and 
Kayecr | HRS leharacten Hansen 
3364-380 3364:40 2 3364°4 
61°8 
61°6 
61:2 
60-950 7 
60°2 
60-038 60-00 In 
59:90 3 59°9 
59°63 2 59°7 
59-262 0 
58°3 
58°2 
56-697 0 
56°342 0 
55-942 55°95 2 55°9 
55-739 0 
55:5 
55°3 
53°696 53°70 1 53°7 
52-987 53:00 2 52:9 
52:3 
51:5 
50:2 
50:0 
48-1 
48-015 1 48:0 
47695 47°72 2 47°6 
46-609 46°61 1 46°6 
45°5 
44-7 
44-360 44°36 2 44-4 
43°745 43°55 In 
43°182 0 43-1 
42-930 0 
42°5 
42-0 
41:0 
40°485 40°50 3 40-6 
40°3 
39°70 In 39°6 
39°532 39°56 4 
39-028 0 
38°535 38°56 5 38°5 
37°985 1 37:9 
37°637 0 37:5 
36°195 36°21 1 36-2 
35°7 
35°185 0 
34°9 
34318 34:35 6 34:3 
33°600 0 
30°968 0 27:9 
27°688 0 
27-039 27:04 2 
Intensity 
and 
Character 
Reduction to 
Vacuum 
A+ 
Oscillation 
Frequency 
in Vacuo 
i 
= 
BB 
=] 
beh lhl =, ales amp aa alate 
— 
