IN CONNEXION WITH THE SPECTRUM OF THE SUN. 
573 
Table I.—Fundamental lines used in the construction of Curves. 
Section 3900-4000. 
A Cornu. 
s 
:o 
EH 
m 
O 
o<5 
A Curve A from Pho¬ 
tograph A. 
A Curve B from 
Ruthereurd’s 
print. 
Error A Cornu 
- A A. 
Error A Cornu 
- A B. 
State in Cornu’s 
Map. 
State in angstrom’s 
Map. 
State in Standard 
Photograph. 
Intensity in Solar 
Spectrum 
1 = darkest. 
Remarks. 
3897-0 (Fe.) 
Absent. 
3897-00 
0 
Single : winged 
Absent 
Single .. 
1 
3898-4 (Fe.) 
3898-63 
-•23 
„ * >, 
1 
3902-0 (Fe.) 
3902 10 
-•1 
’1 >' 
„ 
31 . . 
1 
*3904-8 
3904-77 
+ •03 
» 
1 
3909-4 
n 
3909-23 
+ •17 
Single 1 .. 
11 
Double (?) 
3, 2** 
**Probably double. Iden¬ 
tity with Cornu’s line 
doubtful. 
3913-4 
3913-82 
, , 
-■42 
» 
Double (1) 
2 2 ## 
# *Probably double. 
3916-6 
3916-50 
+ 1 
>> 
11 
Single .. 
2 
3918-4 (Fe.) 
3918-72 
-•32 
,, 
>» 
2 
3920-0 (Fe.) 
3920-00 
0 
,, 
„ 0) 
1 
Probably double. 
*3922-1 (Fe.) 
3922-27 
-•17 
„ 
11 
1 
3927-2 (Fe.) 
3927-30 
-■10 
}) 
1 
3929 8 (Fe.) 
3929-77 
. , 
+ •03 
,, . . 
13 
1 
3935-2 
3935-17 
+ •03 
Double .. 
3, 3 
3937-8 
3937-72 
+ •08 
Single 
2 
3940-0 
3940-43 
-•43 
,, 
2 
3941-8 
3941-80 
0 
2 
3943-1 
3942-70 
3943-30 
-•20 
., winged 
Single 
11 • • 
1 
3946 9 
Absent 
3947 00 
-•10 
Absent 
Triple 
3, 3, 3 
3947-9 
)} 
3947-85 
. , 
+ -05 
i) * • * • 
3) 
Single (?) 
2 
Probably triple. 
3950-0 
3951-50 
3950-22 
-•22 
,, 
Triple .. 
2 
*3952-0 
3951-72 
+ ■28 
Single 
2, 2, 2 
3955-0 
Absent 
3954’50 
+ 0 
Absent 
Single .. 
2 
3955-8 (Fe.) 
3955-50 
+ •3 
13 
Triple .. 
2, 2, 2 
3959-2 
3959-48 
-•28 
Single .. 
3 
3960-5 
3961 20 
3960-50 
0 
,, winged 
Single 
11 • * 
1 
3963-6 
Absent 
3963-60 
0 
. . . 
Absent 
Dopble .. 
3, 3 
3965-0 
3965-05 
— ’05 
)) 
3, 2 
3965-8 
3965-80 
0 
2, 2 
3968-7 
3968-40 
+ •3 
Single .. 
1 
3970-4 
3970-32 
3970-45 
+ -08 
-•05 
2 
3973-0 
3973-00 
3972-80 
0 
+ •2 
„ 0) 
1 
Probably double. 
3975-5 
3975-27 
3975-33 
+ •23 
+ •17 
,, 
Double (\) 
3, 3** 
**Probably double. 
3978-9 
3978-74 
3979-00 
+ •16 
--1 
2. 4 
3981-0 
3981-24 
3981-20 
-•24 
-•2 
„ 0) 
2, 3** 
**Probably double. 
3983-7 
3983-15 
3983-40 
+ •55 
+ •30 
Single .. 
1 
*3986-1 
3986-0 
3986-18 
3986 36 
-•08 
-■26 
Double .. 
Single 
Double .. 
U 1 
3989-0 
Absent 
3989-12 
3989-16 
-■12 
-•16 
Single .. 
Absent 
Single .. 
1 
3993-25 
„ 
3993-60 
3993-30 
-•35 
-•05 
Single .. 
Double .. 
2, 2 
3997-5 
3997-8 
3997-72 
3997-33 
-•22 
+ ■17 
Single 
1, 2 
3999-8 
Absent 
3999-80 
3999-80 
0 
0 
Absent 
2, 2 
I A line in Angstrom’s Map 
4000-7 
4001-24 
-■54 
Single .. 
2 
|-at wave-length 4001 "4 not 
4003-3 
4003 40 
-■] 
3 
J capable of being identified. 
*4004-4 (Fe.) 
4004-7 
4004-72 
-•32 
Single 
Double .. 
1, 1 
4006-0 
Absent 
4006-28 
-•28 
Double .. 
Absent 
„ 
2, 2 
4007-4 
>> 
4007-56 
-•16 
Single .. 
Single .. 
4 
4008-6 
31 
4008-50 
+ -1 
Double .. 
2 
4009-40 
13 
4009-25 
+ •15 
,, • • • • 
4, 1 
# Lines marked thus are those measured absolutely by Cornu. Lines marked (Fe.) are iron lines, assigned to this metal 
by Cornu, which have been identified by a comparison photograph of Fe and solar spectrum. 
N.B.—In the case of lines which the standard photograph resolves into groups of two or more, the centre is always taken 
for measurement. In the case of multiple lines, the intensities are placed in the same order as the lines are seen when looking 
at the map, i.e., the more refrangible on the observer’s left. The scale of intensities adopted is the same as that employed by 
Thalen for the metallic spectra—1 being the darkest and 5 the lightest. In the overlapping portions of curves A and B 
the .values given by B are adopted. 
