Gore — On Known Variable Stars. 177 



52. T Geminoeum. — Schonfeld says the uniform period is some- 

 times in fault as much as 13-7 days. At the magnitude 9-5 there 

 seems to be a strong retardation in the increase of light, but this 

 is also variable. On the whole the increase seems quicker than the 

 decrease. 



53. S Pijppis. — Discovered to be variable at Cordoba. It was 

 called S by Lacaille, and this falls in with Argelander's nomenclature 

 of the variable stars. It was rated 6 m. by Lacaille, and 7 m. by 

 Taylor. Dr. Gould does not assign a period. 



54. T Puppis. — Dr. Gould states that this star " has varied by not 

 less than seven-tenths of a unit" during the progress of the Cordoba 

 observations, "having increased from 7'0 m. or less in 1871 to 6-5 in 

 1875, and diminished again since then to 7-2." From this it would 

 seem that the star probably belongs to Espin's Class III., viz. : — 

 Variables having small variation of light with a period of several 

 years. Dr. Gould says ''it is decidedly red." 



55. U Gemtnoefm. — A very extraordinary variable, with a most 

 irregular period. Sometimes it rises to a maximum with astonishing 

 rapidity ; in February, 1869, according to Schonfeld, it increased 

 3 magnitudes in 24 hours ! From the maximum it diminishes with 

 a slow and very variable light curve. The visibility at maximum 

 usually lasts only 14 days; in 1858, November, not 10 days. At some 

 of the maxima there is a secondary minimum. According to Schonfeld, 

 the smallest interval observed between 2 maxima was 75 days, the 

 greatest 617 days; and he thinks the period fluctuates between 70 

 and 150 days. At the Maximum of ISTovember, 1858, Baxendell found 

 that the star " had a somewhat hazy or nebulous appearance." 

 Colour not remarkable. A neighbouring star (No. 248 of " Cata- 

 logue of Suspected Yariables") has been suspected of variation by 

 Winnecke. 



56. E Cancei. — Period derived by Schonfeld from observations, 

 1850 to 1859; but he thinks the period is increasing, and that the 

 early observations to 1833 require a period of 364 days. Increase of 

 light quicker than the decrease. From the observations of 1830, the 

 minimum falls about 125 days before the maximum. A 10 m. star, sf. 



57. Y Cancel — Schonfeld calls its colour "gelbroth." An 11m. 

 star follows, on the parallel, and a 10-11 m. sf. 



58. TJ Cancei. — Well observed since 1858 by Winnecke, and since 

 1865 by Schonfeld. According to the latter, the Elements fix the 

 later maxima within 4 days. For a month before and after the maxi- 

 mum, the increase and decrease of light are nearly equal. At the 

 minimum the star totally disappears in Schonfeld's telescope; and, 

 according to Chacornac, even in a 9-inch refractor. 



