‘ 
‘ 
olour of the 
Continuous 
spectrum at 
the Place. 
me) VOL, XXIX. PART I. 
THE SOLAR SPECTRUM AT THE DATE 1877-1878. 
Object Observed, generally a black, fixed 
Fraunhofer Line. 
Grand line with haze— 
Haze begins, 
Ist side of line, 
2nd oO. 
Haze ends, 
Hazy line, 
Stronger hazy line band, 
Broad haze band, almost 
resolved into lines— 
Ist side, 
2nd do. 
Hazy band line, 
Very powerful line: lst side 
R 2nd do. 
Strong line, 
Do. 
Decided ane 
Fine ee 
Strong line, 
Powerful line, 
Strong line, 
Appear- 
(All this part very imperfect in Angstrom. ) 
Strong line, 
Fine line, 
Strong line, 
Powerful ee fee es 
Fine line, 
Strong line, 
Stronger line, 
Powerful and aE wo 
Strong line, 
Do. 
Fine line, 
Strong double line— 
lst component, 
2nd do. 
Fine line, : : : 
Strong line, . 
Triplet of lines— 
Ist and strongest, ., 
2nd and intermediate, . 
3rd and weakest, 
A grandly powerful line set in haze, 
and other fine lines— 
Haze begins, 
Fine line i in haze, 
Bee side of grand line, 
oO. do. 
Strong line in_haze, 
Do. do. 
Do. do. 
lh. 15m. p.m. Only one more very powerful line before H’.—The lines this morning are very hazy and 
Intensity | ANC? by 
of black, or| S™@Phical 
peas ive ; 
of line. symbol. 
0°5 
10 
10 iM 
5-5) bate: 
p ‘ 
2 ip 2 
4 = 
4 
4 
2 
g ity} 
8 
: l 
3 
9 | 
2 | 
1 | 
2 | 
4 | 
2 | 
2 | 
t | 
2 | 
‘ l 
1 | 
D) ! 
3 I 
5 I 
| 2 
2 I 
il | 
4 | i} 
a hl 
1 | 
2 | 
4 I | 
ei al 
2 | J 
0°3 
1 
19: 
7 = 
4 — 
4 
‘‘worstedy,” perhaps from deficient illumination. 
Tuesday July 2nd, 1878. 
PLACE- 
| Differences. 
DATA, 
from 
Angstrom’s 
Grating Nor- 
mal Solar 
Spectrum. 
Micrometer 
Reading. 
Rey. 
data from 
Angstrom, 
10°800 
10 ‘819 jron. 
10°855 
62 390 
11185 
11°220 
11°247 
11°250 
11°286 
11°307 
11°395 
11°428 
11450 
11°470 
Tron. 
| 62 516 
11°500 
11°506 
11527 
11°580 | 
11°483 | 
11°610 
11°626 
11°650 
11°690 
11°712 
11'730 
11°774 
11°787 
11°835 
11°863 
11'904 
11-932 
Tron. 
Manganese. 
11°960 
12° 925 
Thalen, &e. 
Chemical-origin- 
Manganese. 
Manganese. 
| 
| 
— 
Concluded 
NUMBER- 
PLACE, per 
British Inch. 
fore brighter, and the definition improved, but the Dispersion is now too small for much accuracy. 
3393 
Cle a 
BaP) 6 
12 
4 
12 
22 
19 
10 
17 
12 
22 
11 
8 
11 
11 
7 
25 
9 
8 
6 
4 
5 
2 
6 
15 
10 
5 
7 
12 
Fh 
5 
14 
2 
15 
10 
13 
7 
8 
a1 | 
14 
8 
13 
5 
9 
9 
43 
Prisms altered ; being now Prisms 8 and 8, Dispersion=10. The illumination is there- 
4Q 
