SPECTRA OF SOME OF THE BRIGHTER STARS. 
697 
(1-) 
The hydrogen lines are very 
broad, but a great number of fine 
metallic lines are visible. 
(2.) 
The hydrogen linos are not so 
broad as in (1), and all the chief 
solar lines are clearly visible. 
(3.) 
The hydrogen lines are still 
broader than in the solar 
spectrum, but not so broad as 
in (2). All the solar lines are 
very distinct. 
S CassiopeiEe 
^ Arietis 
S Leonis 
13 Comse Berenicis 
16 Comae Berenicis 
a, Ophinchi 
a Aquilae 
/3 Cassiopeiae 
14 Comae Berenicis 
7 Herculis 
a. Cephei 
f Aquarii 
a Canis Minoris 
12 Comae Berenicis 
7 Yirginis 
A complete list of the lines seen in the spectra of these stars would be superfluous, 
as it would be practicallj a list of the lines which appear in the solar spectrum. 
(3.) SUB-DIVISIOJI y. 
Characteristics of the Spectra. 
In the stars of this sub-division, the hydrogen lines are extremely broad, and the 
additional lines are correspondingly faint. The characteristic lines occupy the same 
positions as lines in the spectra of stars in Sub-division a, the principal ones being 
those at XX 4025, 4471, 4481. The stars given in the list bear a close resemblance 
to each other, but two further sub-divisions may be recognised. In the first of these, 
of which Persei may be taken as a t 3 'pe, the lines at 4471 and 4481 are almost of 
equal intensity; in the second, e.g., a. Andromedse, 4471 is very faint, and other 
additional faint lines appear. 
Further Suh-division. 
(1) 
The strongest additional lines are 
at XX 4024, 4471, and 4481, the 
latter pair being of equal intensity. 
(2.) 
The intensity of the line at X 4481 
diminishes, whilst the line at 
X 4471 is unaffected and other 
faint lines appear. 
f Cassiopeiae 
a Andromedae 
/3 Persei 
48 Persei 
7 Leonis 
(3 Aurigae 
a. Leonis 
/3 Canis Minoris 
t Ophiuchi 
/3 Ursae Majoris 
7 Lyrae 
a. Pegasi 
r Atlas 
r Maia 
Pleiades < Alcyone 
Pleiades < Taygeta 
y Merope 
h Capricorni 
Electra 
4 u 
MDCCCXCIII.—A. 
