312 
Colour of the 
Continuous 
Spectrum at 
the Place. 
Glaucous. 
PROFESSOR PIAZZI SMYTH ON 
Object Observed, generally a black, fixed 
Frauenhofer Line. 
Last double line repeated— 
1st component, 
2nd do. 
Suspected hazy line, 
Strong line, . 
Fine line, ] 
Do. 
Do. : 
Strong line, . 
Fine line, 
Do. 
Blank region 
in Angstrom. 
Fine line, 
Very strong double line— 
1st component, 
2nd do. 
A group of fine lines— 
Probably a water- 
vapour group 
said to be strong ze Le 
in summer and 4th au. 
in a low Sun. 
Fine line, 
Strong line, 3 
A triplet : Ist and faintest, 
2nd strong, 
3rd _ do. 
An even triplet— 
Probably a Tel- 
luric —_—water- 
vapour group. 
1st component, 
2nd do. 
3rd do. 
An inclined triplet : 1st and smallest, 
2nd and middle, 
38rd and strongest, 
Fine line, 
Do. 
A triplet : 1st component, 
2nd do. : : 
3rd do. strongest, 
Re-focussed. 
Last, or 3rd of inlet, ene, 
Fine] ine, 
Stronger line, 
A faint and uneven triplet— 
1st component, 
2nd do. 
3rd do. 
Fine line, ; F : 
A strong but uneven double— 
1st component, 
2nd do. 
| Fine line, : ; 
Strong double line: 1st component, . 
2nd do. 
Group of fine lines : 1st component, . 
| 2nd do. 
| 3rd do. 
apie: 4th do. 
1st component, 
Intensity 
of black, or 
thickness 
of line. 
me bo 
wo Be HH pH ee PD 
WOH ROH ERY EEE 
ee wnre do ww 
oo Ht ee 
Loe) me bo 
et ee 
Appear- 
ance by 
graphical 
compara- 
tive 
symbol. 
nee 
Micrometer 
Reading. 
Rev. 
7380 
7398 
7534 
data, from 
Angstrom, 
Thalen, &e. 
Angstrom's 
Grating Nor- 
mal Solar 
Spectrum. 
_ Iron and 
50 152 Titanium. 
Tron. 
Tron. 
Tron. 
Tron and 
perhaps 
Tell. water- 
vap. group. 
Tron. 
59 382 
50 393 
Calcium. 
Tron. 
Probably a 
Tell. water- 
vap. group. 
Titanium. 
Titanium. 
Nickel. 
Tron. } 
Tron. 
Chemical-origin- 
| 
| 
Tron, 
50 620 | Unknown. 
Nickel. 
Tron and 
Titanium. 
} 
Concluded 
PLACE, per 
British Inch. 
Differences, | 
e| 
17 
£6 00 ow Ss) wh n 
or 
cor 
for o>} 
a) 
3. é 
nn 
) 
35 ao 
a2 | 35 
ao) am 
