ASTRONOMY FOR 1889, 1890. 



135 



Eeferenco should also be made bere to the lists of stars witb peculiar 

 spectra detected upon tbe Harvard Observatorj^ l)botograpbic plates 

 and published from time to time by Professor Pickering" in the Astro- 

 710 m i.sch e Nachrichten. 



A spectroscopic snrvey of the southern heavens by direct observa- 

 tion has been nndertaken at the Melbourne Observatory. An <S-inch 

 refracter and the 4 -foot reflector will be used iu the work. 



MOTIONS OF STARS IN THE LINE OF SIGHT. 



The following is a comjiarison of the results lor motion in the line of 

 sight obtained by Dr. Vogel at Potsdam with a])hotographic telescope, 

 and those obtained by Maunder at the (ireeuwich Observatory by eye 

 observations. The motions are given in geographical miles, + repre- 

 senting recession, and — approach : 



Dr. Vogel's interesting results with regard to Algol and other stars 

 have been alluded to elsewhere. 



Bright lines in stellar spectra. — Mr. Espiu has detected bright lines in 

 the spectra of a number of variables when near their maxima, among 

 them K Leonis, K Hydne, y ^yg'd, K Andromeda^, and S Cassiopeia^ 

 all of Secchi's third tyi)e. Similar lines in the spectra of U and V 

 (Jygni, of the fourth type have been suspected by the Lick observers, 

 ami when these stars were far removed from their maxima. Mr. Keeler 

 also liuds that he is able to break up the apparently continuous spectra 

 of stars of the type of the Wolf-Rayet stars in Cygnus into an extremely 

 complicated range of absorption bands and faint bright lines. 



A remarkable form of spectrum has been discovered by Professor 

 Pickering in that of the star Pleione, for the F line consists in this case 

 of a narrow bright line superposed on a broader dark line, the other 

 hydrogen lines showing some indications of a similar character. 



ASTRONOMICAL PHOTOGRAPHY. 



The photographic chart of the heavens. — The permanent committee 

 ai)pointed by the Astrophotographic Congress at Paris, in 1887, as noted 

 in the Review of Astronomy for the years 1887-88, held their first 

 meeting at the Paris Observatory in September, 1800. The results of 

 the seven seances are contained in a series of twenty-eight resolutions, 

 some of the most important of which are mentioned below. 



