IN CONNEXION WITH THE SPECTRUM OE THE SUN. 
273 
Plate XIII. Strip III. — STRONTIUM. 
W ave-length. 
Length. 
Whether re- 
versed in the 
Solar Spec- 
trum. 
Whether in 
the Spark- 
Spectrum of 
the Chloride. 
Remarks. 
6550-0 
2 "> 
Not present. 
6501-5 
2 
55 
6407-0 
1 
55 
6387-0 
2 
55 
6380-0 
2 
55 
5970-5 
2 
55 
5850-0 
2 
55 
5540-0 
2 
55 
5533-5 
2 
55 
5522-5 
2 
55 
5503-5 
2 
55 
5485-0 
1 
55 
5480-0 
2 
55 
5256-0 
1 
> 
Not reversed. 
55 
5238-5 
1 
55 
5228-5 
1 
55 
5225-5 
1 
55 
5223-5 
1 
55 
4967-5 
1 
55 
4961-5 
1 
55 
4876-0 
1 
55 
4872-0 
1 
55 
4831-5 
1 
55 
4812-0 
1 
55 
4783-5 
1 
55 
4740-5 
1 
55 
4721-0 
1 
4607-5 
4 
? 
Present. 
This is the very longest Sr line, and in Hoffmann’s 
continuation of Kirchhoff’s maps two solar lines fall 
within the boundary of it, which is wide. One of 
these now remains, and is the calcium line 4606 5 * ; 
the other was probably this Sr line : the numbers in 
Hoffmann’s continuation are 2386-0 and 2386-4 ; the 
position of the centre of the forked extremity of the 
4305-3 
2 
Not reversed. 
Sr line would be about 2386-2. 
f 
Coincident 
1 
J Coincident with the longest Ca line ; this line 
4226-3 
3 
with solar 
Ca line. 
” 
| probably belongs really to calcium. 
f 
Coincident 
] 
f Coincident with another Ca line whose length is 
4215-3 
4 
with solar 
1 
[ unknown. 
Ca line. 
4161-0 
2 
Not reversed. 
Not present. 
° 
4078-5 
4 
? 
55 
Not reversed in Angstrom s Map. 
* So given in Angstrom's Map, but Tna l£n in his list makes the calcium line and that of strontium abso- 
lutely coincident at 4607-5. 
