58 J. C. F. Zitiner on a new Spectroscope. 
a greater shcrpeg tage ~ in the Palzozoic Crinoids, than do ~ 
the sand canals of the recent echinoderms, is that the function 
of the system of canals ‘(of which they are ‘all appendages,) was 
at first mostly respiratory, whereas in the greater number o 
the existing groups, it is more or less prehensive or locomotive, 
or both. 
[To be continued. ] 
Art. VIIL—Upon a new © ghana with aie li e te 
Spectral Analysis of the Stars; by Dr. J. C. F. Z 
STELLAR spectrum analysis, in addition to ie. revelations 
oncerning the physical constitution of the hea ies, 
has begun most recently to claim attention in an_ increasing 
degree in another no less interesting direction. With the ai 
of this method the prospect is presented of proving, and under 
favorable circumstances also of measuring, what influence is 
exerted on the lines of the spectrum of a star by the compo- 
nents of the sounee — of the earth and star along the 
line uniting the two bodi 
A single feet Gee fon that effects which two separated 
bodies exert upon one another by means of a periodical popula 
of a limited rapidity of propagation must be modified by a 
continual change of the distance eens them. It is Dop- 
pler’s merit to have first, in the year 1841, recognized the 
aes of this influence,+ although the conclusions which he 
Gerived from it with respect to the “eolor of the stars must be 
acknowledged as incorrect by reason of a disregard of the invis- 
ible parts of the sp 
ith reference to sound this influence was proved to be ¢ 
_formable to the demands of theory by numerous capes ae 
of Ballot, Mach and others. 
On the contrary with reference to light it has not been pos- 
sible hitherto to establish by observation a trustworthy value 
(sicher nachweisbare Grésser) of this influence, because even the 
cosmical sapaapiaan which are the greatest at our disposal for 
this ¢ object, are very small in comparison with the rapidity of 
the i sce of light. 
The great improvement however, which optical instruments 
for the observ tion of spectra have experienced since the dis- 
__ * From the Proceedings of mees of Saxony at 
oe — at Fb Ge toon es N. aan assistant wie 
; ; t of double ease some other 
iety o ces, a Get) 
* 
a 
