294 PROFESSOR PIAZZI SMYTH ON 
Appear- PLACE- Differences. | 
4 2° I 57253 Telluric ° 35 346 
Second stron est, ; : - 15 I I) 
0°7 
/ ( Last and weakest, 57°288 vapour. 35 380 
Galourcrithe Intensity ance by : DATA, Chemical-origin-]| Concluded Fs 
Continuous Object Observed, generally a black, fixed, of black, or eeupiical Mimametér Sues pec hates ae 2g g 
Spectrum at Fraunhofer Line. thickness se 8 Grating Nor-| Thalen, Ee PLACE, per =3 g 
the Place: ‘ of line. | symbol. Rey. mal Solar British Inch. || $58 | 4 
Spectrum, BA) 6 
Suspected finest line, Ol ' 55°516 34 120 100 
Rather stronger line, 0°3 | 55658 34 220 30 
Fine line, 0°2 | 55°703 34 250 33 
Fine line, . 0:2 ' 55745 34 283 197 
Hazy line, 0:3 a | 55873 34 410 ad 
Suspicion of a line, 0-1 ' 55°912 ‘ 34 490 
Fine line, . 0°3 | 56°016 34 500 a 
Do. 0°3 | 56049 34 560 10 
Do. 0°3 | 56°136 34 570 : ) 
Do. 0°3 | 56°170 | 34 600 FO 
Stronger hazy line, 0°5 “rp 56°238 34 650 40 
Do do. 0°5 = 56288 34 690 oe 
Telluric ; 
Stronger and clearer line, . 1 | 56°344 34 722 water- 34 722 38 
vapour. :: 
Do. do. 1 1 56394 34 760 ” 
Do. do. 1 1 56°433 34 787 7 
Fainter line, O'5- , : 56°446 34 795 37 
First faint line of a band, 6 3 1 | 56°496 Telluric 34 832 . 
Second stronger, 3 1 Ment 56°516 water- 34 847 iy 
Third strongest, 2 56'541 vapour. 34 864 4 
Single line, 1 | 56°576 34 890 ; 
: First and strongest line of a band 2° ] 56°611 . 34 913 E 
nO Second rather weaker, : 25s 1] iI! 56623 fee ee 34 924 2 
- 14 Another still weaker, 1 «|p CHIN] 56-640 ore 34 933 L 
Last, weakest of all, 1 | 56 ‘658 Bors 34 947 = 
Strong line of a band, 2 J 56°701 34 980 19 
Weaker line, 1 Led 56°721 34 992 ‘aa 
Last and weakest line, 1 | 56°746 35 009 
Single line, strong, 2 | . 56°784 35 036 35 036. 
Very faint Line 0°3 } 56°801 : 35 050 y 
Fine line, 1: | 56°851 Telinries || “some ae 
Stronger line, . 2° | 56866 DOH 35 093 PY 
Very faint double line, 0-7 \ 56914 pour 35 129 " 
\ Fine line, 0°5 | 56-922 | 35 152 35 132 . 
The above bracketed lines, 34 722 to 35 132 W.-N., constitute the preliminary band, before the little w band ; it i 
apparently composed of water-vapour lines, and increases in number and thickness of lines egregiously with a low 
Sun and in warm, damp weather. 
/ CRIMSON-RED, as the colour of the continuous spectrum, ends at 35,000 ; and RED begins. 
Fine line, . : : : : : LT | 56960 35 159 
Fine line, . 3 ‘ ; ; : 1 ' 56984 35 178 
Fine line, . ; é 5 ; ; 1 \ 57036 35 212 
Fine line, . : : ; ; : 1 | 57084 Telluric 35 243 
Stronger line, . ; ; : 2 15 ! 57098 35 252 watery 35 252 
Fine line, . : : , : : 1 ' 57°110 vapour. 35 261 
Fine line, . 1 \ 57123 35 270 
Strongest line yet, . ; ; ; 3 | 57142 35 280 
Fine line, . z é ; . : 1 | 57°158 35 292 
RED. Faintest line of a bandelet, . ; 0°5 7 57'182 Telluric 35 308 
Stronger ofdo. . .  . .| o7 |y Sif} 57-204 watery 35 322 
Strongest of do. ; ; Lo” ih 57°214 vapour. 35 329 
Centre of a clear space, . : . 57°233 35 339 35 342 
i‘ Strongest line of a bsg ; 
57262 watery 35 363 
