PROFESSOR PIAZZI SMYTH ON 
120 
CYANOGEN. Op TuBE—continued. 
P $ Appear- | wy p) I “iti Constituents Unclaimed 
Colour. Subject of Observation. Intensity. ance: -N. Place, mpurities. ainsoclared! eee wy 
| 
| A black s ‘aint li 1 
| A bla pace follows, faint line there- 
| in, developes afterwards into a cyan- 1 1 44 878 Cee 
Citron. ogen line, = . . : . 
Sharp edge of a citron band, 3 Hn. 45 200 Carbon 
(| A band after a regiou of thin close lines, 2 bh, 47 806 Nitrogen ? 
Vv . : : Cyanogen 
| ery sharp line begins a band of lines, 4 l.... 48 582 48 582 
Green band begins, . 4 48 862 Carbon 
|| A line in that band, vi: ia 49 050 Nitrogen ? 
| Green. j An isolated line, 3 1 | 49 350 Nitrogen? | { Cyanogen 
I 
N.B.—The above two lines are certainly not Blow-pipe’s, or Carbo-hydrogen’s green-giant and its second 
following line, which read as now measured specially in a flame close by, 49 178 and 49 516. 
| \) Faint band begins, . . 2 1 49 996 | Nitrogen? | Cyanogen? 
f Stronger band with central line, . 3 i 50 170 Nitrogen ? 
Line, . . : : : 3 | 50 510 Nitrogen ? 
Line, . 3 | 50 728 2 ? 
Line, . ; 3 | 51 100 Nitrogen? 
Fainter line, ‘. : : ; 2 | | 51 260 2 F 2 
| Sharp beginning of graduated band, 4 Hn, | 51 650 Nitrogen 
Glancous, 4 Glaucous Hydrogen, ; 2 a 52 250 Hydrogen 
|| Very faint haze band, : : 2 is 52 585 Carbon 
Sharp beginning of strong band, 4 Bao " 52 794 © Nitrogen 
Faint line, . : : ; 3 1 | 53 836 | 2 
|| Sharp beginning of strong band, 4 Ea 53 960 Oyanodas 
| Faint line, . 4 1 | 54 460 Nitrogen 
(| Band begins 3 Hr, 54 642 © ’ Nitrogen 
Line, . 1 Z ; : 2 | 55 271 2 ? 2 
Sharp beginning of strong band, 4 55 630 Nitrogen 
Blue. Very weak band, 1: : 0°5 56 370 Carbon 
Graduated band begins, 3 56 645 Nitrogen 
Do. do. 3 i, 57 602 Nitrogen 
Indigo. 
| Faint band begins, . 2 : 1 58 290 2 2 
Strong linear beginning of a band, 3 is, 58 530 Nitrogen 
} g g iz] fo} 
| Violet. { Grand line peculiar to Cyanogen, 5 E.. 59 405 } Cyanogen 
/ Strong beginning of a band, 4 Shey 59 511 | Nitrogen 
| Very faint band, 9. 2 60015 | 8 2 eos 
| Band begins, 3 i | 60 535 | Nitrogen 
ee 
| Lavender. 4 | Faint band begins, 2 61 335 Nitrogen 
| | Very faint do. 5 1 62 065 Nitrogen 
Stronger band begins, 3 it, 62 625 | Nitrogen 
| Faint band begins, 2 63 496 | Nitrogen 
f 
End of Spectrum. 
This Cyanogen tube, remarkable at first for its bright white light to the eye,—so that its end-on view reminded me of a 
little full Moon high in the sky,—possessed then sree carbon bands, 
violet, and a more regular vertical stratification of w 
what the Nitrogen tube itself showed, 
no hydrogen at all, most brilliant lines and bands in the 
at are here called Nitrogen bands, in the red, orange, and yellow, than 
Now the light is pink, hazy, and faint. The Carbon bands far smaller ; a little hydrogen has come into view; the extra 
regularity of the Nitrogen bands being still partly kept ae 
The powerful violet line at 59 405, may become useful as a reference for place to many observers. 
