80 W. Huggins on the Spectra of some of the Nebula. 
scope were caused successively to fall upon the opening of the 
slit, which was about ;', inch $#, auch, is method of 
observation showed that the light from different parts of the 
nebula is identical in refrangibility, and varfes alone in degree 
of intensity. ‘ | 
In addition to these objects the following were also observed: 
[92 M. Very bright globular clusters of stars in Hercules.] 
The bright central portion was brought upon the slit. A faint 
spectrum similar to that of astar. The light could be traced — 
from between C and D to about G. Too faint for the observa- 
tion of lines of absorption. 
50 H. IV. Very bright; large; round. In Hercules] The | 
spectrum similar to that of a faint star. No indication of bright | 
Ines, 
i 
) 
eda was brought upon the slit. The spectrum could be traced 
from about D to F. The light appeared to cease very abruptly. 
in the orange; this may be due to the smaller luminosity of this | 
part of the spectrum. No indication of the bright lines. we | 
[82 M. Very bright; large; round; pretty suddenly much 
brighter in the middle.] This small but very bright compan- 
ion of the great nebula in Andromeda presents a spectrum 
apparently exactly similar to that of 31 M. The spectrum ap- 
ars to end abruptly in the orange; and throughout its length 
is not uniform, but is evidently crossed either by lines of ab- 
sorption or by bright lines. 
[55 Androm. Fine nebulous star with strong atmosphere.] 
The spectrum apparently similar to that of an ordinary star. 
[26 IV. Very bright cluster in Eridanus] The spectrum 
could be traced from the orange to about the blue. No indica- 
tion of the bright lines. Several other nebule were observed, 
but of these the light was found to be too faint to admit of sat- 
isfactory examination with the spectrum apparatus, é 
It is obvious that the nebule 37 H. IV, 6 =, 73 H.IV, 51 H. 
IV, 1 H.IV,57M, 18 H. IV, and 27 M, can no longer be regarded 
as srereeatone of suns after the order to which our own sun and 
the fixed stars. belong. We have in these objects to do no longer 
with a special modification only of our own type of suns, but 
ind ourselves in the presence of objects possessing a distinct 
and peculiar plan of structure. 
_ In place of an incandescent solid or liquid body transmitting — 
light of all refrangibilities through an atmosphere which inter- 
cepts by absorption a certain number of them, such as our sun” 
appears to be, we must probably regard these objects, or at least 
their photo-surfaces, as enormous masses of luminous gas or va- 
por. For it is alone from matter in the gaseous state that light 
[81 M.] The brightest part of the great nebula in Androm- 
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