336 
PROFESSOR PIAZZI SMYTH ON 
Colour of the 
Continuous 
Spectrum at 
the Place. 
Lavender. 
Object Observed, generally a black, fixed 
Fraunhofer Line. 
Hazy thick line: Ist side, 
2nd do. 
Finer line, 
Hazy thick line; Ist side, 
2nd do. 
Finer line, 
Hazy thick line: Ist side, 
2nd do. 
Hazy unequal band: Ist side, . 
nd do. 
Hazy strong line group— 
Ist side, 
2nd do. 
Faint band, 
The grand gloomy haze of H? begins, 
The first side of the grandly 
black H? line, = aE: 
The second side of the 
grandly black H? line, 
The grand gloomy haze of H? ends 
nearly, . ; “ : : . 
Hazy line darkest to right, 
Hazy line, : : : 
Very dark hazy 
Fainter haze group, . 
group, 
All the last 20 observed subjects have been badly defined, unsatisfactory and deficient in light ; while the spectrum || 
itself and all light formed thus, it is to be remembered, through glass and noted by the eye alone, ends at the last one. 
Intensity 
of black, or) 
thickness 
of line. 
coco coi coi 
10 
10 
rm Sow OD 
Appear- 
ance by mtlcrometer DATA, Chemical-origin- 
graphical Reading. from ‘ data from 
compara- Angstrom’s Angstrom, 
tive Rew Grating Nor-| Thalen, &e. 
symbol. mal Solar 
Spectrum. 
Fe fe 12074 <h 
i } 13-143 | 64 114 Aluminium } 
12424 
1p-4a4 {| 64 284) bon | 
12°585 i) 
12°668 { 
13738 | 64 424 Aluminium | 
= 12°884 
12°925 
13122 Trou and 
wh a 13:2'75 Be ee Calcium, 
13°420 
38 13°420? 
= 13°610 ? 
= 13°728? 
14324 ? 
Differences, | 
Concluded - 
WAVE- ||? ..| 4 | 
| Amerne| 2a) B 
'| British a 3 8 i 
ao) B 
64 117 11 
| 64 128 64 
| 64 192 | 
24 | 
64 216 5 
64 221 -| 
64 232 
48 
64 280|| 40 
64 290 
64 349 " 
64 381. || 22 
36 
64 417 13 
64 430 
BEY 
64 463 
17 | 
64 480 
| 76 
| 64 556 
| 51 
|| 64 607 
| 47 
|| 64 654 
oF 
64 654 64 | 
64 718 41 
64 759 
64 960 
