334 
Colour of the 
Continuous 
Spectrum at 
the Place. 
Lavender. 
PROFESSOR PIAZZI SMYTH ON 
Object Observed, generally a black, fixed 
Fraunhofer Line. 
The last grand line alone, 
repeated for place— 
1st side, 
2nd do. 
Triplet of sharp lines— 
Ist, and strongest, 
2nd, and moderate, 
3rd, do. 
Hazy double line : 1st component, 
Qnd. do. 
Faint band, 
Powerful double— 
lst component, 
2nd = do. . 
Strong double line: 1st component, . 
2nd do. : 
Strong line, : dj : 
Very powerful line— 
Ist side, 
2nd 
Strong line, 
A long hazy band of fine lines, ter- 
minated by a powerful line— 
1st component, 
2nd do. 
3rd do. 
4th do. 
5th do. 
6th do. 
7th = do. 
8th do. 
9th do 
10th, and chief, 
Band ended by a strong line— 
1st component, 
2nd do. : 
3rd_—s do. : ; 
4th, and chief line, 
Strong line, 
Powerful line, . 
Strong line, : 
Strong triplet of lines— 
lst component, 
2nd do. 
3rd do. 
Very fine line, . 
Fine line, 
Strong double line: 1st component, . 
2nd 0. 
Band of 6 lines: 1st component, 
2n do. 
3rd_—s do. 
4th = do. 
5th ~— do, 
6th = do. 
Intensity 
of black, or 
thickness 
of line. 
ee 
oo 
eHpop oodl 
rewcjt 
wd 
Re ep 
Ole ro po 
ec HEE coco wl oo Brrr 
wownwhd co 
Appear- 
ance by 
graphical 
compara- 
tive 
symbol. 
Micrometer 
Reading. 
| 
| 
ll 
| | 
J 
i Mi 
a4 
| 
if 
' 
lil 
9'142 
9162 
9°170 
9°202 
9°223 
9278 
9°295 
9°356 
9°377 
| 9398 
9°420 
| 9455 
| L 9-488 
PLACE- 
DATA, 
Chemical-origin- 
from 
data, from 
Angstrom, 
Thalen, &c. 
Angstrom's 
Grating Nor- 
mal Solar 
Spectrum, 
62 790| Iron. 
\ 
62 984 |Manganese. } 
63 O35 |Manganese. } 
Iron. 
63 231 Iron, } 
Reker — | 
Concluded 
WAVE- 
NUMBER- 
PLACE, per 
British Inch. 
From 63 230 to 63 400 empty in Angstrom ; but apparently from instrumental insufficiency only. 
Differences. 
Be| A 
13 
5 
14 
16 
6 | 
27 | 
45 
11 
10° 
6 a 
14 | 
13 | 
8 
10 | 
16 | 
| 
10 
12 
10 | 
16 
a 7 
5 - 
16 i 
a 
4 y 
26 
8 . 
8 
8 
13 
11 
21 
