160 
REPORTS ON THE STATE OF SCIENCE. 
TRIDIUM—continued. 
Arc Spectrum Spark Spectrum 
Wave-length . | Wave-length ; 
. | Intensity, Intensity 
an and 
Kayser ae Character Penet ae peer: 
2959°573 0 
2959-2 1 
59-049 0 
56°699 0 15157 (i lee 
56-0 1 
555 In 
54-909 1 54:9 4 
53-205 0 54°6 1 Fe? 
52-686 0 52°7 In 
51°363 2951:35 8 51:3 4 
51-266 2 
50°883 50°89 2 
50-606 50°61 | 1 DO Gi she ol 
50°4 1 
49-882 49-89 3 49°8 1 
48°5 In 
47°48 1 
47:093 47°10 3 47:1 2 
45°7 1 
44-0 1 
43°287 43°30 8 43°3 eS 
42-7 1 
41-197 41-20 2 41-2 1 
40-669 40-66 3 40°7 2 
40°548 0 
39°390 39°40 3 39°4 4 
39:2 1 
38°877 38°87 1 
38-606 38°60 3 
38-097 0 
37°656 0 
37°371 0 37:3 1 
36°814 36°85 8 36°7 4 
36°20 In 36:2 1 
35°427 0 
35°305 35°30 1 35:3 1 
34°748 34°76 6 34-7 + 
33°252 33°25 1 32°7 1 
32°7 1 
0 322 1 
31°821 0 
30°743 30°75 2 30°7 1 
30°298 30°30 1 30°3 1 
29°8 4 
27°833 0 
27:7 1 
.27:129 27:14 1 2771 1 
26°7 1 
26°212 0 26°2 1 
25:2 4 
24:912 24:94 10 24:9 4 
24:0 1 
21:237 0 21:3 2 
20°9 1 
Reduction to 
Vacuum 
1 
7 ea ros 
A 
ai aa 
0°84 | 97 
”> 99 
”? ”? 
” > 
99 99 
” ” 
” th} 
99 ” 
29 3 
29 99 
> 9 
te) 9 
” 9° 
»” be} 
” ’ 
9 39 
ted ” 
? > 
” 99 
be 9°8 
9° 99 
0°83 x 
39 ”° 
33 3° 
3 ” 
9 > 
9° 
99 > 
99 bed 
” ”? 
> 39 
” ” 
29 3° 
39 9° 
” 2 
99 39 
999 3? 
9 3° 
99 9 
Le] 9 
” 99 
”> 39 
” 9 
29 33 
9 99 
99 39 
3° 3? 
” 9 
Led 39 
” 92 
? ” 
2° 9° 
aa 99 
Oscillation 
| Frequency 
in Vacuo 
33778°9 
83° 
