426 PROF. F. W. DYSON: DETERMINATIONS OF WAVE-LENGTH FROM SPECTRA 
Spectrum 
of 
chromosphere. 
Wave No. of ■ Inten- 
length. photos, sity. 
1 
Element.. 
Probabl 
Wave¬ 
length. 
e identification. 
Intensity. 
Spark. 
Are. 
Sun. 
f Fe 
4132-23 
6 
8 
10 
1 
1132-59 
3 
1 
\ 
\ 
l - 
4132-69 
— 
~ 
3 
J 
4133*08 
1 
0 
Fe 
4133 -06 
4 
8 
4 
4133*83 
4 
1 
Ce 
4133-97 
8 
10 
0 
Measures discordant, 4133'73, 4133'75, 4134-01, 4133-84. 
4134 *81 
3 
1 
Fe 
4134-84 
5 
10 
5 
4135*58 
7 
2 
— 
— 
- 
— 
— 
4137 *54 
7 
3 
— 
4137 -57 
— 
- 
2 
4138*62 
1 
0 
— 
— 
— 
— 
— 
4143-27 
2 
1 
Nd 
4143-30 
8 
— 
— 
f pHe 
4143-92 
2 
_ 
_ 
4143-91 
1 
1 
l. Fe 
4144-04 
7 
10 
15 
On four photos, there are two bright lines separated by 
"4143-27 
4 
3 
— 
— 
— 
- 
— 
an absorption line. 
4144*04 
Absn. 
line 
— 
— 
— 
- 
— 
_ 4144 *88 
4 
2 
— 
— 
— 
- 
— 
4146-36 
4 
2 
— 
— 
— 
- 
- 
4149-33 
6 
3 
Zr 
4149-36 
20 
10 
2 
4150*10 
4 
2 
Ce 
4150*06 
10 
— 
00 
f Ti 1 
f 5 
5 
1 
4151 -07 
5 
2 
4151-13 
\ 
} 1 
1 Zr J 
l 6 
4 
J 
4152-14 
5 
2 
La 
4152-11 
10 
s 
2 
Identified in sun as Fe, La. Possibly Ce. 
4153-96 
1 
1 
Fe 
4154-07 
2 
4 
- 
f 
4154-67 
4 
6 
4 
1 
4154-71 
4 
1 
Fe \ 
y 
1 
4154-98 
3 
6 
4 
J 
4155*66 
2 
1 
- 
— 
— 
- 
— 
r N.i 
4156*24 
10 
_ 
0 
i 
4156-33 
7 
5 
< 
1 Zr 
4156-39 
10 
8 
1 
J 
4157-26 
2 
1 
— 
— 
— 
- 
— 
4158-05 
3 
1 
Fe 
4157-95 
2 
6 
5 
f Zr 
4161-37 
10 
7 
2 
' 
4161-51 
4 
3 
< 
y 
l Ti 
4161-68 
2 
2 
4 
4162-73 
1 
1 
— 
- 
—* 
- 
— 
4163-80 
5 
4 
Ti 
4163-82 
20 
2 
4 
Identified in sun as Ti-Cr. 
4164-43 
2 
i 
— 
— 
— 
— 
— 
4165-71 
3 
2 
Ce 
4165-76 
10 
4 
1 
4166-93 
1 
0 
— 
— 
— 
— 
— 
4167 *42 
" 3 
3 
— 
4167 *44 
— 
— 
8 
Very broad. ? Double. 
4168*80 
1 
0 
— 
— 
— 
— 
— 
4169*58 
1 
0 
— 
— 
— 
- 
— 
4169*95 
3 
1 
— 
— 
— 
— 
— 
4170*89 
2 
1 
— 
- 
— 
— 
— 
4172*05 
7 
3 
Ti 
4172*07 
10 
1 
2 
4172*81 
1 
0 
— 
— 
— 
- 
— 
4173*53 
8 
5 
Fe 
4173-53 
2 
1 
1 
4174-48 
2 
1 
— 
— 
— 
— 
— 
4175-62 
3 
1 
Fe 
4175-81 
4 
8 
5 
Wave-length of arc line 4175-71 (K. and R.). 
