104 
PROFESSOR W. N. HARTLEY AND MR. W. E. ADENEY 
The Spectrum of Thallium. 
Scale- 
numbers. 
Description of lines. 
Wave¬ 
lengths. 
Remarks. 
5-09 
Paint, short. 
47400 
Yery great extension is character- 
29T8 
Weak, very short. 
4270-5 
istic of some of the strongest 
lines in this spectrum. 
36-43 
Weak, very short. 
4152-7 
Coincident with an air line. 
39-36 
Strong, very short. 
4109-4 
42-92 
Weak, discontinuous, fine, sharp 
4057-2 
Coincident with an air line. 
46-38 
Weak, very short. 
4009-2 
51-90 
Strong, very short. 
3932-7 
63-37 
Weak, very short. 
3790-0 
64-55 
Very strong, continuous, sharp, very 
much extended. 
3775-6 
72-80 
Weak, very short. 
3682-2 
73-50 
Weak, very short. 
3674-6 
74-95 
f Faint, very short. 
3658-9 
75-50 
t Faint, very short. 
3652-9 
87-75 
Yery strong, fine, continuous, extended 
3528-8 
88-70 
CVery strong, broad, continuous, sharp, 
very much extended, with a nim- 
- 
^ bus on more refrangible side . 
3518-6 
89-44 
1 Weak, very short. 
3512-7 
89-90 
fWeak, very short. 
3507-8 
95-55 
Strong, short. 
3455-8 
104-03 
Strong, short, fine. 
3381-3 
105-44 
Yery faint and short. 
3369-1 
108-06 
Weak, very short. 
3347-4 
113-95 
Faint, very short. 
3299-6 
114-72 
Faint, very short. 
3293-6 
115-34 
Yery faint and short. 
3288-6 
117-45 
Faint, very short. 
3271-6 
120-74 
Faint, fine, sharp, discontinuous . . 
3246-6 
123-22 
Strong, continuous, fine, sharp, ex- 
tended . 
3229-0 
125-06 
Weak, short. 
3214-2 
127-59 
/ Faint, short. 
3195-6 
128-87 
[ Faint, short, broad, nebulous .... 
3186-6 
132-43 
Strong, short. 
3162-6 
134-68 
Faint, short.. 
3146-7 
138-72 
Faint, short. 
3119-4 
139-90 
Faint, short. 
3111-4 
140-73 
Faint, short. 
3105-7 
143-02 
Yery strong, continuous, sharp, weak 
in the centre. 
3091-0 
171-50 
f Strong, continuous, fine, sharp . . . 
2920-8 
172-21 
< Yery strong, continuous, broad, ex- 
tended. 
2917-7 
176-49 
Very faint, fine, continuous .... 
2893-9 
185-06 
Faint, short, nebulous. 
2848-6 
187-43 
Faint, short. 
2836-7 
189-73 
Weak, continuous, sharp, fine 
2825-4 
192-32 
Faint, short, nebulous. 
2812-5 
201-87 
Yery strong, broad, with faint nimbus, 
much extended. 
2767-1 
214-63 
f Faint, continuous, fine. 
2709-4 
214-89 
[ Strong, continuous, fine. 
2708-6 
217-72 
Faint, short. 
2700-1 
224-075 
Faint, short.. 
2669-1 
