110 PROFESSOR PIAZZI SMYTH ON 
AMMONIA, Enp-on Tuse. NH. 
July 28, 1879. 
Colour. Subject of Observation. Intensity. SRO W.N. Place. Impurities. Pane re Unclainiedtes 
Crimson- | Part 1. : 
Red. First faint red band, . : : 0°5 = 34 010 Nitrogen 
Faintest haze intervenes, 3 
Red Faint band 1 aan) '88 2bb8 Nitrogen 
ed. ain and, . ’ . . 5 — 37 202 1g 
Stronger and defined band, . We || of Fae Nitrogen 
Scarlet-Red. Band well defined, ; é , 25 = os ae Nitrogen 
Part 2. 
Band defined at sides, . : ; 2 || } Bs a Nitrogen 
Scarlet-Red. Red hydrogen line, brilliant, . : 8 i 88 707 Hydrogen 
Band) ee are | : 2° = a Nitrogen 
: : : 39 222 ; 
Band split down middle, : : 2°5 fe) 39 498 Nitrogen 
Light-Red. Do. do. ee 25 | Be bp bee Nitrogen 
——_-— Bright hazy line, . : : 2 40 132 Hydrogen 
Do. do. 3 ? : 4 2 40 309 Hydrogen 
Do. do. ; ; 2 40 487 Hydrogen 
40 652 - 
Band, . : ‘ F ; ; 2 =| } i 795 Nitrogen 
Definition generally admirable. 
Sharp line, 3 | 40 943 Hydrogen ? 
Orange. Line in haze, 15 1 41 128 Hydrogen ? 
Haze intervenes, 0'5 
Line in haze, 2 sys | 41 231 Oxygen ? 
Line, - 2 | 41 386 Hydrogen 
Haze intervenes, Ob. |: 
Line, ; 2 | 41 479 Hydrogen 
Line, 2 | 41 670 Nitrogen ? 2 
Haze intervenes, OB | wee 7 F 
ydrogen + 
Line, 2 | 41 838 } + Nitrogen ? 
Haze intervenes, OO | ove axe 
. rogen + 
Line, strong, 3 1 | 42 114 se Nieowee 
Fainter line, . 15 ! 42 186 Nitrogen ? 2 
Still fainter line, 1 ' 42 298 Nitrogen ? 2 
Orange. Bundle of thin lines, 2 Ill 42 497 Nitrogen ? 2 
Haze intervenes, 0°5 # 
Bundle of thin lines, 2 Ill 42 792 eee 2 
oak an ydrogen + 
Se Se Thin line, 1 | 42 934 } + Nitrogen ? 
A signal and strong yellow line, but 
Yellow. tested not to be in Sodium’s ey 3 I 43 156 ||) 
but slightly beyond it, 
43 158 
Part 3. 
The former yellow line, ; 2 | 43 161 
Bundle of thin se : : 15 Hill 43 286 Nitrogen ? 2 
Yellow. Line, : ‘ : ; 1 | 43 410 Nitrogen ? 2 
Line, . é : : 1'8 | 43 532 Hydrogen 
Strongest line yet, : : : 3°5 | 43 690 Hydrogen 
Hazy region intervenes, nearly resolvable into lines. 
