MARY W. WHITNEY. 253 
The spectrum of the new star was also continuous, 
without lines, dark or bright ; and according to many 
authorities truncated at the red end. All observers do 
not agree in this statement, that the red end was want- 
ing, at least, all do not mention it. Dr. Copeland, of 
Dun Echt observatory, speaks of it as *‘ quite con- 
tinuous’’ without qualification. All agree, however, 
that it much resembles that of the great nebulain which 
itlay. Dr. Copeland thought at times that he saw 
glimmerings of bright lines, but he used no stronger ex- 
pression than ‘‘ suspicion of bright lines.” 
The spectrum of the Nova Andromeda, therefore, 
gives no evidence of a special illumination of hydrogen, 
such as characterized 7’ Corone and V Cygni. More- 
over, the similarity between the spectra of nebula and 
star suggests a real connection between the two. But 
many astronomers do not accept this correspondence as 
conclusive, and incline to the opinion that the Nova is a 
temporary lying in the direction of the nebula only, 
and having no connection with it. Within the area cov- 
ered by the nebula lie more than a thousand small stars, 
and one of these, according to their view, has proved 
itself a temporary. Hasselberg, of Pulkowa, holds that 
the want of bright lines in the spectrum is not sufficient 
cause for throwing the star out of the category of the 
Nova Corone and Nova Cygni. 
It indicates, he thinks, a difference of internal con- 
stitution rather than different causes inducing the out- 
burst. He adds, that if it has a physical connection, it 
ought to be within the nucleus of the nebula. Ido not 
see a sufficient reason for this statement. Further, there 
should be some visible change in the nebulaitself, which 
change careful observation does not substantiate. This 
is an objection of some weight, though it should be re- 
membered that there is extreme difficulty in determin- 
ing the outlines of a nebula, good observers differing 
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