124 
PROFESSOR W. N. HARTLEY AND MR. W. E. ADENEY 
The Spectrum of Arsenic. 
Scale- 
numbers. 
Description of lines. 
Wave¬ 
lengths. 
Remarks. 
13-90 
Weak, very short, fine. 
4550-0 
There are several lines in this spec- 
14-48 
Weak, very short, fine. 
4538-4 
trum which are continuous and 
1673 
Strong, discontinuous. 
4494-3 
nebulous. Most of the strong 
f Strong, short. 
4474-0 
lines have a nimbus. 
< 
Strong, discontinuous. 
4466-3 
Strong, discontinuous. 
4458-7 
20-14 
Strong, discontinuous. 
4431-0 
20-95 
Weak, discontinuous. 
4415-0 
23-45 
Weak, discontinuous. 
4368-7 
24-54 
Weak, discontinuous. 
4349-0 
25-34 
Weak, discontinuous. 
4335-2 
26-52 
Weak, discontinuous. 
4315-2 
Weak, discontinuous. 
4301-0 
An approximation. 
30-79 
Weak, discontinuous. 
4244-0 
31-66 
Weak, discontinuous. 
4229-3 
33-02 
Weak, discontinuous. 
4207-3 
33-68 
Fairly strong, discontinuous .... 
4197-7 
34-19 
Weak, discontinuous. 
4188-9 
38-70 
Weak, short. 
4120-0 
41-15 
Fairly strong, discontinuous .... 
4081-8 
42-49 
Weak, short. 
4064-3 
44-50 
Strong, short. 
4036-0 
46-54 
Weak, short. 
4007-0 
48-13 
Faint, short. 
39850 
50-80 
Fairly strong, discontinuous .... 
3948-5 
52-07 
Fairly strong, discontinuous .... 
3930-7 
52-88 
Strong, discontinuous. 
3921-6 
58-99 
Strong, discontinuous. 
3842-5 
62-50 
Faint, discontinuous. 
3800-7 
63-62 
Fairly strong, discontinuous .... 
3784-4 
64-86 
Faint, discontinuous. 
3772-0 
73-82 
Weak, discontinuous. 
3671-2 
78-34 
Faint, very short. 
3622-4 
81-32 
Weak, very short. 
3591-9 
85-38 
1 
Weak, discontinuous. 
3551-6 
85-88 
1 
Weak, discontinuous. 
3545-8 
89-54 
Faint, short. 
3510-8 
93-78 
Weak, discontinuous. 
3471-1 
118-98 
Faint, very short. 
32601 
119-46 
Weak, short. 
3256-2 
128-70 
Faint, short. 
3187-7 
129-60 
Faint, short. 
3181-7 
137-66 
Faint, continuous, fine, very faint in 
centre. 
3125-4 
138-86 
J 
Strong, fine, continuous, with a nimbus 
3119-2 
139-34 
1 
Strong, fine, continuous, with a nimbus 
3116-1 
140-42 
Faint, short, nebulous. 
3107-7 
145-56 
Fairly strong, continuous, fine . 
3075-0 
148-40 
("Strong, continuous, fine, weak in 
centre, with a nimbus .... 
3057-3 
149-10 
Strong, continuous, fine, weak in 
centre, with a nimbus .... 
3052-6 
152-38 
Strong, continuous, sharp .... 
3032-2 
157-12 
Weak, continuous, faint in centre . 
3003-2 
159-22 
Fairly strong, fine, continuous . . . 
2990-2 
