THE SOLAR SPECTRUM AT THE DATE 1877-1878. a2 
Appear- PLACE- one Differences. 
Colour of the Intersit ance by | yj ter DATA, Chemical-origin- oncluded ynie aaa 
Continuous Object Obesrved, generally a black, fixed of black, ad ee Reading ia eras date Arbo ee 2 g g 
ectrum ai un. ine. thickne: 4 * ngstrom, a & 
e Place. eros of ae eathl Rey. Guiive Nor Thalen, &e. peepee 32 2 
Spectrum. (=) 
_—— it este sete | veers ey eee | ol 
Fine line, . 1 | 13107 55 580 1 
Hazy band: Ist side, 2 is 13°150 a oe 7 
2nd do. 2 = 13°180 5 
Hazy band, 1 = | 13-272 55 618 
1 
Triple group of lines: 1st component, 2 | ) i 13°338 ae 24 ee 9 
2nd do. 1 \ 13°373 55 642 nknown. 42 
8rd do. Nt 137430 Titanium. (|| 55 651 |) ° , 
Fine line, 1 | 13°635 55 704 16 
Do. 1 l 13705 ao 55 720 an 
Strong line, shaded to right, : 25 = | 13°845 fas 2 753 25 
_| Strong sharp line, : 3 13948 arium. 778 
’ Bicone line, 2 | 14-042 Titanium. 55 800 Ze 
Ds orm 20 
Fine line, 1 | 14135 55 820 a 
Very strong line, 4 | 14:191 | 55 835] Titunium. | 55 834 f 
q Fine line, oar 1 | 14°228 55 842 12 
, _ Do. : A : 1 | 14°280 55 854 12 
j Strong line, 2 | 14°332 Iron. 55 866 im 
‘ 
’ Fine line, F 1 | 14°386 55 877 10 
Do. ; 1 | 14-428 55 887 a0 
Strong line, 2 | 14°470 55 897 é 
Haze band : 1st; side, : : é 1 = “V| 14°495 55 902 4 
2nd do. = 14°510 55 906 16 
n Group of graduated lines— 3 
Fp enon : i oe Titanium. ee aes 10 
0 oO. | : 9 
3rd and strongest, 3 14683 55 944 12 7 
LUE. | Very fine line, . 07 ; 14°733 55 956 12 
, Do. : . 07 | 14°790 55 968 
; Very strong double line— nae La 32 
1st component, é 3 14932 itanium. 
' ond ae e 3 Ff Il 14:945 56 000 Calcium. 56 002 2 I 
| } Fine line, : : 5 1 14:993 Calcium. 56 013 a 
Strong double line: 1st component, . 2 | 15:035 : 56 022 
(Single in ae 2nd do. 2 | il 15-085 penn aE 56 036 || 14 19 
Fine line, 1 ' 15°170 56 055 : 
Hazy band : 1st side, a eh)! geo Cobalt. |) 33 o69 || 9 
Fine line, ; 1 | 15°283 56 082 12 
Very black line, 3 ! 15°332 56 094 Iron, 56 094 
11h. 55m. 14 
A band of lines : 1st component, 1 15°393 a8 ae 8 
2nd do. 2 15°428 ops i) 
Sadi audtahier, 3 ull 15-455 el eneiaa || & 
4th and last, 2 15°476 56 126 a 
Strong hazy line, 2 AE 15543 Barium. 56 140 7 
Stronger and hazy line, 3 HH 15-672 56 167 Titanium. 56 167 36 
Fine line, 1 | 15°825 56 203 5 
Broad faint haze band : 1st side, 06 = 15°908 Titanium. 56 221 15 
2nd do. 0°6 = 15°977 56 236 af 
Wide double line: 1st component, 2 | 1 16°075 } 56 258 12 
2nd do. 2 | 16°130 56 270 56 270 
Last pair repeated: 1st component, | 2 | | 7780 a 56 258 || Jo 
(Very faint in ae rs 2nd do. Z | 7°835 56 270 i 56 270 16 
sine line, - 3 d 7 | iene 2 a 11 
0. 4 5 
Do. 412 | 7-973 56 302 41 
VOL. XXIX. PART I. f 4N 
