SPECTRA OF SOME OF THE BRIGHTER STARS. 
717 
pointed out in a previous communication.It is among the least condensed stars 
that we should expect the bright carbon to be more manifest, and, indeed, in the 
spectrum of Mira Ceti photographed by Professor Pickering, there is strong evidence 
of the presence of one of the more refrangible carbon bands commencing at X 4215. 
(d.) That there is a very considerable amount of continuous absoi'ption in the 
ultra-violet or violet has already been stated, and the photographs reproduced in 
Plate 26 fully demonstrate this. 
It is evident that the sequence of the spectra photographed should resemble that 
deduced from eye observations. In the case of the stars already photographed (see 
Table C, Sub-division a) this order was as follows, the group of stars being divided 
into fifteen species ;— 
a Orionis 
V Bootis 
a Ceti 
Species 15. 
8 Virgin is 
a Herculis 
a Scorpii 
yS Pegasi 
8 (3phiuchi 
/X Geminorum 
p Persei 
> 
1 
J 
} 
10 . 
55 
9. 
55 
8 . 
There is evidence that ^ Andromedse, which was not included by Duner in his 
Tables, should also be included in Species 15. Gothard observed the spectrum of 
this star in 1882, t and stated its spectrum as Vogel’s Class III.— a. (Group II.); 
Duner, however, re-examined the spectrum^ and recorded that it was like that of 
a Tauri, in the red there was “almost a band,” but the remainder of the spectrum 
consisted entirely of lines. My own observations at Westgate, and Mr. Fowler’s 
observations at Kensington, in the latter part of 1888, showed that the spectrum 
presence of these bright carbon flutings.i Dr. Copeland had previously made important observations of 
“ Nova ” Orionis with reference to this point,^ and he identified one of the bright bands as “ the great 
hydrocarbon band seen in the spectrum of every comet that has been examined under favourable 
circumstances.” Referring to his observations of a Orionis, Mr. Maunder^ states that “ the cai’bon 
band at 5164 was coincident (within the limits of obseiwation with this dispersion) with the bright space 
towards the blue of Dunce’s band 7.” 
* ‘ Roy. Soc. Proc.,’ vol. 44, p. 59. 
t ‘ Public, des Astr. Obs. zu Hereny,’ Heft 1, p. 50. 
t ‘ Sur les Etoiles,’ p. 86. 
^ ‘ Roy. Soc. Proc.,’ vol. 47, p. 40. 
- ‘ Monthly Notices,’ vol. 46, p. 112. 
® ‘ Greenwich Spect. Observations,’ 1889, p. 22. 
