OBTAINED AT THE TOTAL SOLAR ECLIPSES OF 1900, 1901 AND 1905. 
445 
Strontium. 
Two of the strongest lines in the chromosphere are due to Sr. These are strong 
arc lines and extremely strong in the spark. Two other lines, almost equally strong 
in the spark and arc, are not shown. 
1 
Wave-length. 
Spark. 
Arc. 
■ Chromosphere. 
Sun. 
3380-89 
80 
8 
Sr ? 1 
3464-58 
100 
8 
— 
1 
4077-88 
100 
10 
15 
Sr 8 
4215-66 
100 
10 
12 
Sr 5d 1 
Possibly a line at 4305'61 is also shown. 
Yttrium. 
Yttrium is strongly shown, all the strong spark lines of Exner and Haschek 
being present. At least 20 lines may be safely identified as yttrium. 
Zirconium. 
A few of the stronger arc lines given by Rowland and Harrison occur in the 
chromosphere, while practically all the strong spark lines given by Exner and 
Haschek are shown. As this element furnishes a good illustration of the relation¬ 
ship of the chromospheric and solar spectra to those of the spark and arc, the lines 
assigned to zirconium in the chromosphere are given below. 
Wave¬ 
length. 
Intensity in the— 
Wave¬ 
length. 
Intensity in the— 
Chromo¬ 
sphere. 
Sun. 
Spark. 
Arc. 
Chromo¬ 
sphere. 
Sun. 
Spark. 
Arc. 
3392-11 
1 
2 
15 
10 
3668-61 
0 
00 
4 
3404-95 
1 * 
0 
6 
5 
3674-85 
2 
1 
10 
3 
3410-39 
2 
1 
8 
1 
3698-28 
3 
2* 
10 
— 
3430-71 
1 
1 
10 
3 
3714-92 
2 
0 
6 
— 
3438-38 
2 
2 
15 
5 
3731-37 
2 
0* 
10 
— 
3479-48 
1 
2 
10 
— 
3751-80 
2 
00 
12 
— 
3481-31 
2 
2* 
10 
5 
3766-94 
2 
1* 
10 
— 
3496-33 
2 
2 
20 
7 
3836-91 
4 
1* 
12 
— 
3505-77 
1 
1* 
8 
4 
3914-58 
2 
1 
4 
— 
3552•11 
2 
1 
10 
3 
4048-82 
2 
1 
10 
7 
3556-81 
3 
2 
15 
5 
4149-33 
3 
2 
20 
10 
3577-00 
2 
1 
10 
— 
4209-15 
2 
1 
10 
— 
3614-92 
3 
2 
10 
5 
4258-24 
2 
0 
5 1 
7 
3624-03 
1 
1 
8 
4 
4348-06 
1 
1 
8 I 
3 
3630-13 
1 
1 
5 
1 
4379-94 
2 
0 
12 
7 
3636-69 
0 
1 
4 
1 
1 
4403-49 
2 
0 
4 
1 
* Compound lines. 
