102 
PROFESSOR W. FT. HARTLEY AHD MR. W. E. ADENEY 
The Spectrum of Indium. 
Scale- 
numbers. 
Description of lines. 
Wave¬ 
lengths. 
Remarks. 
7'60 
f Strong, short, fine. 
4681-5 
8-83 
< Strong, short, fine. 
4655-2 
9-58 
[ Strong, short, fine. 
4637-0 
15-88 
f Very strong, continuous, fine, extended 
4510-2 
30-10 
< Strong, and very short. 
4253-1 
39-91 
[Very strong, similar to line 4510'2 
4101-3 
41-84 
TVery strong, very short. 
4071-6 
42-53 
J Weak, very short. 
4063-5 
44-61 
| Very strong, very short. 
4032-7 
45-20 
[Fairly strong, very short. 
4025-6 
58-10 
Very strong, short. 
3852-8 
Fairly strong, short. 
3840-5 
59-53 
Very strong, short. 
3834-7 
62-92 
Faint, short, nebulous. 
3794-8 
] 06-56 
Faint, short. 
3359 5 
119 31 
OVery strong, continuous, fine, sharp, 
J extended . 
3257-8 
119-68 
| Stronger, continuous, broader, more 
extended, with a nimbus 
3255-5 
120-74 
Weak, continuous, fine. 
3246-1 
122-15 
Weak, short, fine, sharp. 
3236-2 
129-02 
Weak, discontinuous, fine. 
3186-2 
130-72 
Faint, very fine in centre, thins away 
at each end. 
3174-1 
Appears to be a tin line. 
132-81 
f Weak, short nebulous. 
3159-7 
134-26 
[ Weak, short nebulous. 
3148-6 
149-97 
Weak, discontinuous, fine. 
3047-0 
Appears to be a tin line. 
151-35 
Very strong, continuous, broad, ex- 
tended. 
3038-7 
156-38 
TVery strong, short, broad, with a 
J nimbus. 
3008-0 
160-70 
] Very strong, short, broad, with a 
nimbus. 
2982-3 
165-115 
Faint, continuous, very fine .... 
29561 
The central portion of this line only 
168-00 
Very strong, continuous, broad, ex- 
is visible. 
tended, fine in the centre . 
2940-8 
169-56 
Strong, continuous, fine, extended . . 
2932-3 
177-34 
Very strong, discontinuous, sharp, ex- 
tended. 
2889-8 
183-50 
Faint, continuous, very fine .... 
2857-1 
187-00 
Very faint and fine, continuous . 
2839-2 
187-70 
Weak, fine, continuous. 
2836-0 
188-38 
Very faint and fine, continuous . 
2832-1 
"1 Between these two lines two or 
204-94 
f Fairly strong, continuous, fine 
2752-8 
j three broad nebulous dots occur. 
205-34 
[Weak, short, nebulous. 
2750-7 
They are too faint to measure. 
208-01 
Faint, short, fine. 
2738-1 
210-56 
Faint, short, broad, nebulous 
2727 0 
213-70 
f Weak, continuous, fine. 
2712-9 
214-56 
[ Strong, sharp, continuous, extended . 
2709-3 
In some photographs this line is 
215-32 
Very faint and fine, continuous . 
2706-4 
strongest in its central portion. 
233-27 
Weak, short, nebulous. 
2631-2 
238-21 
Very faint and fine, continuous . 
2610-8 
240-74 
f Weak, fine, continuous. 
2602-5 
Strongest in its central portion. 
241-34 
[Weak, fine, short. 
2600-2 
243-32 
f Weak, fine, short. 
2591-0 
244-42 
[ Weak, fine, short. 
2586-6 
250-32 
Weak, discontinuous, fine. 
2564-7 
251-76 
Strong, continuous, fine, extended . 
2559-5 
253-30 
Weak, short, fine. 
2554-1 
