168 REPORT—1868. 
while the shadowed sides are towards the violet; this difference is very sub- 
stantial, as we shall see presently. 
The following is a list of the most remarkable stars of this type :— 
o Ceti Nova 234 
a Ceti 137 254 
p Persei 160 fB Pegasi 
Schjel. 44 162 266 
45 Arcturus 267 
59 Schjel. 178 a, Idree 
Orionis Antares 0 Virginis 
67 a Herculis 
120 Nova 
(Their positions can be obtained from Chambers’s ‘ Astronomy.) 
The fourth type is not less remarkable. This is the result of a laborious 
research on the telescopic stars of a red colour. Some of these are very 
small; and none of them exceed the sixth magnitude. This is the reason 
why in my first memoir I limited the spectra to three types only, being en- 
aged on larger stars only. The spectrum of this type consists of three large 
bands of light, which alternate with dark spaces so distributed as to have 
the most luminous side towards the violet. 
A very fine prototype of this is seen in the small star of the Great Bear, of 
the position R.A. =12" 38™:5, Decl.=46°15'N. But occasionally there are in 
the yellow and red numerous interruptions, which divide these large luminous 
spaces into smaller ones, asin the stars R.A. =22"52™-5, Decl. = — 25°51’, and 
R.A. =6" 26™-9, Decl. =38° 33’. A great part of the red stars of the catalogue 
of Lalande, and of that of M. Schjelerup, belong to this or the preceding type ; 
of this last class I have found seventeen remarkable examples. The cha- 
racteristic colour here also may be a guide in the research, since some of 
these are like drops of blood in the field of the telescope. It is to be noticed 
that the line of magnesium 6 falls almost exactly at the end of the second 
luminous band in the green; but the full aspect of the spectrum does not 
justify the presence of such metal, but rather of a gas like carbon, which has 
luminous bands corresponding almost to the dark ones of the star, but not 
exactly. 
I do not attempt, however, to fix the nature of the substances, since I 
have not yet made a sufficient number of comparative measurements ; but it 
seems to me that we are authorized in supposing these stars to be still ina 
different condition from others, perhaps partly in the gaseous state, or at least 
surrounded by a very large atmosphere different certainly from that of the 
others. 
The following is a Catalogue of these Stars of the fourth type. 
Sse. 3 22 = 
Be is e | oe Declination. < Remarks. z a: cj E oe fs Declination. z Remarks. 
eee : ees 2 
h m etl 5 h m ey, 
41 4 36:2 | + 67 54) 6 |Fine 152 12 38:5 |+ 46 15) 6 |Superb. 
43 4 42:8 |+ 28 16] 8 | 159 | 13 19:3 | — 11 59) 533 
51 4 581]/+ 0 59| 6 | 163 38 4738/+ 41 2] 7 
78 6 269 |+ 88 33] 693 |Fine. 229 19 26:5 |-+ 76 17) 693 
89 1 Ub) 43i yas | 238 | 20 8&6 )— 21 45] 64 
124 9 44:6 | — 22 22) 6a 249 | 21 25:8 | 4- 50 58] 9° 
128 10 58 | — 34 38) 7a | 252 | 21 38-6 | +4 37 13] 8° 
132 10 380°7 | — 12 39) 6 |Fine 273 | 23 39:2 |+ 2 42) 6 |Fine. 
136 | 10 44:8 | — 20 30) 6% 276 | 22 52:5 | — 25 51) 6? [Very fine. 
— 
