IN CONNEXION WITH THE SPECTRUM OF THE SUN. 
809 
INDEX TO MAP. (Plate LXXXVI.) 
CALCIUM. 
Lines marked * are those in the Maps of other- observers -which have been omitted from the present Map on 
the photographic evidence. 
Wave-length. 
- 0 State in 
Angstrom’s Maps. 
State in 
ThaiJn’s Maps. 
Length 
in 
Calcium 
Photo- 
graphs. 
3932-8 THJ 
Present. Assign- 
Present. 
1 
ed also to Fe. 
3956-0 
Not present. 
Not present. 
5 
3968-0 TH,1 
Present. Assign- 
Present. 
1 
ed also to Fe. 
3974-0 
Not present. 
Not present. 
4 
*4077-0 
Present. 
Present. 
3 
*4078-5. 
Not, present. 
4091-8 
Present. 
1 * 
4093-3 
Not present. 
Not present. 
1 5 
*4095-5 
Present. 
‘Present. 
4097-5 
3j 
4 
*4098-0 
Not present. 
„ 
*4131-5 
Present. Assign- 
Present. Assign- 
1 
ed also to Fe. 
ed also to; Fe. 
*4143-0 
J 
*4188-5 
Present. 
Present. 
i 
*4192-2 
*4192-5 
Not present. 
*4215-3 
Present. 
” 
2 
4226-3 
Present. Assign- 
1 
ed, also to Sr. 
*4233-0 
Present. Assign- 
Present. Assign- 
ed also to Fe. 
ed also to Fe. 
4237-5 
v 
Present. 
5 
*4247-5 
Present. Assign- 
... A 
ed also to Fe. 
*4249-8 
.... 1 
*4253-9 
Present. Assign- 
Present. Assign- 
. . . . 1 
>■ 
ed also to Fe and 
ed also to Cr. 
Cr. 
J 
Remarks. 
One of the longest Ca lines. In all 
photographs of substances containing the 
smallest trace of Ca. 
Short Ca line nearly coincident with an 
Fe line. In all photographs. 
Long Ca line in the centre of a complex 
group of Fe lines. This line is grazed on 
its. right by an Fe line, but is not coinci- 
■ ° 
dent as m Angstrom's Map. 
Short Ca line in all photographs. 
One of the longest Sr lines present in all 
photographs of Sr and Ca, but invariably 
thicker in the Sr. 
No line in this position in any of the 
photographs. It is probable that this is 
identical with the foregoing line. 
A nebulous line in all photographs. 
Not in any photograph. 
Nebulous line in all photographs. 
This line is probably identical with the 
foregoing. 
Present as mere traces in some photo- 
graphs, absent altogether from others. 
Not' in photographs. 
Not in photographs. ? Identical with 
foregoing line. 
One of the longest Sr lines present in all 
photographs of Sr and Ca, but invariably 
thicker in Sr. 
Longest Ca line in this part of the spec- 
trum. In all photographs of substances 
containing, the smallest trace of Ca. 
Not a Ca line. 
Nebulous line in all photographs. 
Fe line. 
Not in photographs. 
Not an 
5 q 2 
