318 
Colour of the 
Continuous 
Spectrum at 
the Place. 
Glaucous. 
PROFESSOR PIAZZI SMYTH ON 
Object Observed, generally a black, fixed 
Fraunhofer 
Strong double line : 
Very fine line, . 
Line. 
lst component, . 
2nd do. 
Wide double line : 1st component, 
Fine line, 
Very strong ee and mint) 
2nd do. 
Haze extends thus far, 
Group of lines: Ist component, 
2nd do. 
3rd do. 
4th do. 
5th do. 
Fine line, 
Do. 
Do. : 
Strongest line hereabouts, . 
Fine line, . : : 
Do. 
Hazy line, 
Sharp line, 
Do. ; : : 
Double line : 1st component, 
2nd ~—s do. 
Very fine line, . 
Fine line sharp, 
Hazy line, 
Do. : : 5 : 9 
Strong line (from 54 050 to 54 240, 
all is vacant in sresgon, except 
ing this line), 
Perhaps double line, . 
_ Fine line, 
Hazy line, 
Sharp line, 
Sharp line, : 
Rather hazy group : ist component, . 
2nd — do. 
3rd do. 
Hazy band, ; : 
Do. ; ; ; : 
Group of lines : 1st component, 
2nd do. 
3rd do. 
Fine line, 5 
Hazy band, . 
Sharp double line: 1st component, 
2nd 
Fine line, 
Sharp double line : 
Ist component, 
2nd do. 
Then follows a group containing within it, amongst other finer lines, one very strong line, a notable haze at the 
Intensity 
of black, or, 
thickness 
of line. 
| 
| 
_ 
co 
pworworn oF HHHO ww 
oo 
OHHH HHHeRP PEE 
eo oro) ete 
Or K Her Dorn 
ou oO 
or © 
DNWHNNO CNWHO ONHNH 
Appear- 
ance by 
graphical 
compara- 
tive 
symbol. 
Micrometer 
Reading. 
Rey. 
18°358 
hi 
18°413 
18480 
18°550 
18592 
18°675 
18748 
18°865 
18°970 
19°002 
19°034 
19°084 
UG 
19164 
19-235 
19°304 
Angstrom’s 
Grating Nor- 
mal Solar 
Spectrum. 
53 885 
19°340| 54 013 
19°360 
19°382 
19°430 
19°478 
19°526 
. 19°555 
19°570 
19°667 
19°743 
19°790 
19°850 
19:915 
19°978 
20°000 
20°062 
20°117 
20°174 
20°221 
20°265 
20°320 
20°390 
20°470 
20°530 
20°547 
20°587 
20°615 
20°783 
20°833 
20'878 
20°930 
20°982 
20°039 
same time enveloping them all, in this manner and degree— 
fully coinciding With his apparent idea 
characterise the violet end of the spectrum. 
a of its bein 
The pl 
‘ 
Chemical-origin- 
data from 
Angstrom, 
Thalen, &¢. 
2 
Nickel. 
Titanium. 
Manganese. 
Tron. 
Unknown. 
Titanium. 
Titanium. 
Zine. 
Magnesium. 
Titanium. 
a new class o 
Concluded 
WAVE- 
NUMBER- 
PLACE, per 
British Inch. 
53 794 
53 808 
53 823 
53 840 | 
53 850 
53 869 
53 885 
53 912 
53 933 
53 941 
53 948 
53 959 
53 968 
53 977 
53 990 
54 007 
54 013 
54 018 
The whole group is sensibly different from Angstrom’s Ma 
g the first of ‘‘the hazy ones,’ 
aces of the lines or linelets in this particular group are thus- 
lines whic 
Breadths & 
Doubles 
it 
: 
_ 
= 
