439 
OBTAINED AT THE TOTAL SOLAR ECLIPSES OF 1900, 1901 AND 1905. 
Sodium. 
Ihe lines Dj and D 2 can be seen faintly on one of the Sumatra photographs, and 
the lines at 3303 are probably shown. 
Magnesium. 
The b lines and the triplet at 3838, 3832, 3829 are very strongly shown, but that 
at 3336, 3332, 3329 is not shown. The arc lines at 4352 and 4703 may possibly be 
represented in compound lines. The strongly enhanced line at 4481 ‘3 may possibly 
be shown by a line of intensity 1, but the latter line measured can be satisfactorily 
identified with a titanium line. 
Aluminium. 
The strong arc lines at 3944 and 3961 are shown fairly strongly. The three 
strong spark lines at 3581'02, 3601'95, and 3612'68 are possibly faintly shown; but 
the line at 3587T5, intensity 0, may well be due to Fe, and the line at 3602-05 is 
easily accounted for as Y. there still remains a line 3612’65, intensity 0, which 
may be the A1 line. 
Silicon. 
The following table gives a detailed comparison of all the lines in Exner and 
Haschek’s list with the lines in the chromosphere which are possibly coincident 
with them :— 
Spark lines (Exner and 
Haschek). 
Chromosphere. 
Wave¬ 
length. 
Intensity. 
Wave¬ 
length. 
No. of 
photos. 
Intensity. 
3796-50 
2 
3796-44 
1 
1 
3806-90 
3 
Not shown 
3853-62 
1 
3853-61 
1 
1 
Possibly C. 
3854-02 
1 
Not shown 
3856-19 
6 
3855-87 
1 
1 
C. at 3855-77, intensity 3 in sun. 
3862-80 
• 4 
3862-79 
4 
2 
3883-46 
1 
3883-38 
3 
3 
Coincides with head of first C. band. 
3905-71 
5 
3905■68 
4 
0 
In © 3905"66 Si, 12. Chrom. line 
possibly enh. Cr. 
4021-0 
1 
IN ot shown 
4030 • 1 
2 
4029-95 
4 
1 
4096-8 
1 
4097-05 
1 
0 
4103-2 
1 
4103-15 
1 
2 
In © 4103-10 Si, Mn 5. Probably 
not Mn in chrom. 
4128-208* 
5 
4128-31 
4 
2 
Possibly 4128-25 V. 
4131-040* 
6 
4130-96 
6 
2 * 
Possibly 4130-88 Ba. 
4552-7 
3 
4552-64 
2 
0 
4567-95 
1 
Not shown 
4574-9 
1 
4574-95 
1 
] 
4764-20 
2 
4764-39 
1 
2 
Possibly enh. Ti 4764-11. 
* Wave-lengths determined by Hartmann. 
