320 
Colour of the 
Continuous 
Spectrum at 
the Place. 
Glaucous. 
BLUE. 
PROFESSOR PIAZZI SMYTH ON 
Appear- PLACE- 
Intensity set dt Micrometer ef ep Chemical-origin- 
Object Observed, generally a black, fixed of black, or et fans Reading. Tariana data from 
Fraunhofer Line. thickness 2 2 & Angstrom, 
of line ne Rey Grating Nor-| haien, &e 
; symbol. . mal Solar Lc 
Spectrum. 
Group of strong lines: 1st component, 25 =f 10°565 Trond 
2nd doses 2 wan 10°623 54 996 thieyathnern 
3rd dor. 2 | 10°645 . 
GLAUCOUS colour ends here ; and BLUE colour begins. 
Triple group: 1st component, 2 | 10°720 
Qnd_— do. 4 1 i clit 10°755 | , 
3rd do. “ 2 | 10°768 
Faint hazy line, ‘ : : 1 wn ee 
Do. 0. : 1 Ae 10°86 
Very strong and wide double line— 
1st component, 3 | 10°905 55 063 | Unknown. 
nd ado ~~ el Sad Uv sean lh ce 087 | Iron, 
Hazy or double line, : . il 1 ial ale) Calcium. 
Graduated triple— 
1st and smallest component, . Oxf 11°240 
2nd and mean do. : 1 I eal] 11263 
8rd and strongest do i195 i] 11:298 
Strong line, : 2°5 | 11410 Tron. 
Clear line, 1 | 11458 
Quadruple group of fine lines— 
1st component, 1 | 11°516 
Qnd do. 1 fi Cy} 11-5883 
8rd do. 1 | 11°553 
4th — do. to ti 11°570 
Triple group of lines— 
1st component, 1 y j 11°642 
2nd and chief do. a5 J byl,2| 11-665 2 
3rd do. 1 2 lip Vee eetivene 
Double line: 1st component, 15 I] 11°750 2 
and do. 15 | | 11°78 
Fine line, 1 11°792 
Ilh. A.M. 
Strong line (not in Seo : 3 | 11°904 
Fine line, : il i 11°925 
Strong clear line, 3 | Takyi7 55 316 Iron, 
Very fine line, . 1 oar 12012 
Strong line, 2 i] 12°050 
Clear line, 15 | 12°143 
Fine line, 1 | 12'200 
Group of strong clear lines— 
1st component, 2 | 12°248 Manganese. 
2nd do. 3 Peal 3} 12-262 
8rd do. 2 | 12°270 
Strong line, 2 | 12°317 Calcium. 
Stronger line, 3 | 12°367 
Very fine line, . 0°5 ' 12°428 
Very strong line, 4 | | 12.504 |55 448] Calcium. 
Hazy band, 1 Fe 12°574 Af 
Strong line, 2 | 12°655 Calcium. 
Fine line, 1 | ieee 
Do. : ; : : 1 | 2° 
Fine double line: Ist component, 1 | \ 12°846 
2nd do. 1 | 12°875 
Very poe double line— 
Ist component, .| 4 | i } 12°990 65 66S Titan 
itanium. 
ond ~ Ho. 2) aimee 13035 
| 
Concluded 
WAVE- 
NUMBER- 
PLACE, per 
British Inch. 
54 980 
54 997 
55 003 
g 
: 
| Distances.| 2 
Breadths & 
Doubles. 
sy 
~ 
moO 
23 
- Oo 
Nor 
ior) 
