Gore — On Knoicn Variable Stars. 189 



place. Periods of 323 days, 160 days, and smaller have beeu as- 

 signed ; but none of them, seem to represent the observations satis- 

 factorily. In the years 1862 and 1863, according to Schmidt's 

 observations, it remained of 6 mag. for a year and a-half ! He ob- 

 served a Maximum, 1867, [November 6, scarcely 6 m. A very slow 

 decrease followed to 1868, February 14. It then became quickly 

 fainter, and on April 11 was not visible in the Finder. The colour 

 was white, a little yellowish. From April 11 to November 12, 1868, 

 it remained invisible in the Finder. On November 5 it was seen in 

 the refractor as a doubtful star of 13 m. ; and on Februarys, 1869, he 

 found it 13 12. 



I found E, visible to the naked eye in the Punjab, from April 14, 

 1877, to August 1, 1877; and on the following dates in Ireland: — 

 1883, March 31 (5-7 m.), April 8 ; April 20 (5-8 m.) ; April 30 ; May 

 10 (^ m.). 



108. R Seepentis. — "Well observed since 1843. The period is 

 affected with strong inequalities. The numbers in the Catalogue only 

 apply to the epochs siuce I860. According to Schonfeld, observations 

 by d'Agelet near the Maximum, 1783, April 27 and 28, and the sup- 

 posed invisibility of the star to Lalande, 1794, June 13, are well re- 

 presented by the formula : — 



Ep. E. = 1853. 10. 21-0 + 396-34 E- 0-01 E- 



+ 30<* sin (9°.£'+ 144°), 



The star has not been observed at the minimum ; but Schonfeld 

 thinks that it does not descend below 12 m. 



109. V CoEON^. — This star is 8"5 m. in the JDurchrnusterung . 

 Birmingham could not see it, 1873, March 14 and 19, and April 20 ; 

 and 1874, April 10. Ball also failed to see it, 1876, August 1. Duner 

 found it 10-5m., April 21, 1878; but, on September 20, it was 7-8 m., 

 and, on October 5, had risen to 7"5 m. Schmidt observed a Maximum, 

 1882, September 15-6, magnitude 8. 



110. R LiBE^. — Very little observed, owing to the short duration 

 of its visibility even in powerful telescopes. The Elements are derived 

 from 3 observed maxima, 1860-1868 ; but Schonfeld thinks there may 

 be a doubt whether the period of two years is not a multiple of the 

 true period. A 12 m. star s.p. 



111. T CoEOK^. — The wonderful "Blaze Star" discovered by 

 Birmingham, 1866, May 12, 12^ and shortly afterwards observed by 

 several other observers in different parts of the world. When first 

 seen it was equal in brightness to a Coronse, or 2 m. It rapidly 

 diminished, however, and on May 24 of the same year was only 8'5 m. 

 It afterwards increased to 7-8 m. on October 16, 1866, but soon faded 



