THE SOLAR SPECTRUM AT THE DATE 1877-1878. 30D 
Appear- PLACE- aren Differences. 
Intensit ance by Mi t DATA, Gtemicaleonteine oncluded a 
atone Object Observed, generally a black, fixed of ‘black, if ees eadiie, | An ae aiff alii ee 2 a = 
ectrum at Fraunhofer Line. thickness fie Grating Nor- Angstrom, PLACE, per || 52 & 
the Place. of line. symbol Rey. miallSolan Thalen, &e. British Inch.|| © 3 2 
Spectrum. a 
Solitary line, 2 ie 9°528 63 385 a 
Band of small lines : ist dings 3 . 2 ip . 396 4 
2nd do. . e 3 ie 3 400 
3rd do. 3 AC Uh} 9-586 63 409 |) 2 
4th do. 1 I 9°594 63 412 
Very powerful and black 8 
Ine— 
Ist side 9 \| 99g {| 63 420 
and do. 8 |t 9°640 |{ 63419) Irn. || 63 426]| © > 
oo. . ‘alle aaa Mer 83 460 18 
0. : ' 
Very fine line, . 1 ' 9°727 63 468 
Doz do. . 1 ' 9°736 63 470 
Triplet of strong lines— 7 
1st component, . 2 ! 9°753 63 477 9 
2nd do. : : 2 ai | 9°777 63 486 14 
3rd and chief, . 4 | 9804 63 500 iy 
A group of one moderate and four 4 1 9/858 I | 63 524 4 
: : n. 
very strong lines, . : | 4 / lil o aon 63532 mg | 3 542 S 
4 9°920 Ul 63 548 
Quadruple group of lines— I 13 
Ha component, 2 | 9°953 a ei 9 
Qn do. 3 | 9°970 6 
3rd do. 4 |pcilll| 9-99 63 579|| ,° 
4th do. 3 | 107030 63 598 a 
Berender.| vine line, 2 10-060 63 612 
Do. 2 \ 10°095 63 630 10 
Do. 2 | 10°130 63 640 
: 18 
Unequal double line— 
we a ee 5 63 poe 29 
nd and weaker, 
Haze band, 6 : 2 63 686 Manganese. 63 686 - 
Hazy line: Ist side MLE s 63 710 
é Onddo. : .|\# 63 7227) 
4 63 764| | 2 
2 63 783 15 
All these lines are more or less thick | 3 63 798 II 16 
- 3 63 814 
and hazy, and in an atmosphere 22 
2 63 836 
(solar and spectral) of haze, 3 63. 850 ie 
3 63 860 
2 63 874_|| 35 
\) 4 63 887 
Hazy line, 3 63 922 15 
Do. 3 63 937 
The grand haze of H! begins, 1 63 938 
Fi 55 
The first side of the grand] 
Begone 54 tae a| Konand | 63 993 
“ The second side of the 64012) Calcium. 39 
a grandly black H’, ~ | «1/10 64 032 ee 
a The grand haze of H1 ends nearly, 1 64 105 oe 
Prisms re-adjusted. 
Centre of the grand H! line 
as above, for new starting, | 10 11827 |64 012 64 012 
