with the Spectroscope. 77 
In the spectrum of Jupiter are found two bands in the red 
and orange, between C and D, which are not found in the solar 
spectrum. It may be that these bands, as well as those so remark- 
able in « Orionis, Aldebaran and f Pegasi, are absorption bands 
due to the action of the atmospheres of those bodies; still it is 
possible that the application of sufficient optical power would 
resvive them into lines.” 
Sirius is the type, presents spectra wholly unlike that of the sun, 
and are white stars. The third group, comprising « Virginis, 
R 
Snot my intention to hazard any conjectures based upon 
the foregoing observations: this is more properly the province 
of the chemist; anda great accumulation of accurate data should 
be obtained before making the daring attempt to proclaim any 
of the constituent elements of the stars. 
One thought I cannot forbear suggesting: we have long known 
that ‘one star differeth from another star in glory ;” we have 
how the strongest evidence that they also differ in constituent 
materials,—some of them perhaps having no elements to 
found in some other. What then becomes of that homogeneity 
of original diffuse matter which is almost a logical necessity of 
t oe hypothesis ? 
ectr 
noung particularly the relations which may exist between the 
tral revelations and the color, magnitade, variability, and 
duplicity of the objects : 
New York, Dec, 4, 1862. 
wr yeag Writing the above I have seen with Dr. Gibbs the absorption-bands pro- 
i kindred subs 
2 
duced by th “ : ‘ ther tances entirely com- 
p ae aha of iodine, bromine and o 
