178 Proceedings of the Royal Irish Academy. 



59. S Cajstcri. — The variation is of the type of Algol, but, accord- 

 ing to Schonleld, with a marked retardation of the increase of light 

 at the brightness 9-6 m. The duration of decrease 8|- hours, and of 

 increase 13 hours. The uniform period shows an outstanding fault 

 from 20™ to 40", but this Schonfeld considers is also periodical. 

 Argelander remarked that after the minimum the light begins to 

 increase very rapidly, and he is inclined to suppose that its descent 

 from the maximum is even still more rapid. Schmidt observed a 

 Minimum (below 9 m.) 1877, March, 12^ IV' 40", Athens M.T ; also 

 in 1882, April 14, at lOi^'l and ll'^-S, when it was only 11-7 m., 

 fainter than he had ever seen it before. An 11m. star precedes, 

 nearly on the parallel. 



60. S Htdr^. — The maxima are, according to Schonfeld, some- 

 times well marked, and sometimes for a week with a very slow 

 variation of light. He calls its colour "rothlich gelb." 



61. T Caijcei. — Schonfeld says it is very difficult to observe on 

 account of its extraordinary red colour {ungemein roth). The maxi- 

 mum occurs about 7 months before the minimum, but can hardly be 

 determined with precision, owing to the small changes of light 

 in this phase. Six observed minima are well represented by the 

 Elements. 



62. T Hyde^. — According to Schonfeld, the Elements given fix 11 

 maxima since 1858 within a few days. 



63. E Cabins. — Discovered to be variable at Cordoba. Dr. Grould 

 finds it red in all its phases. The observed maxima give periods of 

 329, 306, and 326 days. Dr. Gould states that '' the minimum 

 appears to take place considerably more than half a period later than 

 the maximum, and the variation of light at that time to be relatively 

 slow. But while the magnitude is above 9, its change is quite rapid, 

 being at the rate of one unit monthly ; and the duration of the maxi- 

 mum is very brief." He gives the following dates of maxima : — 1871, 

 July 17; 1872, June 10; 1873, April 12; 1874, March 4 {JJrano- 

 metria Argentina, p. 252). The star is Lacaille 3932 = 2551 Brisbane. 

 It is included in Sir John Herschel's List of Bed Stars {Cape Ohs. 

 p. 448, where it is described as a "very intense sanguine star, be- 

 tween scarlet and carmine red." Erom observations, 1880-1883, at 

 "Windsor, N. S. "W., Tebbutt deduced a period of about 313 days, with 

 Maxima about the following dates: — 1880, December 16 (4'3 m.); 

 1881, October 21 (5-4 m.); 1882, September 2 (4-9 m.). And Minima 

 about the following dates: — 1880, July 5 (9-2 m.) ; 1881, June 8 

 (9-3 m.); 1882, March 27 (9-3 m.) ; and 1883, February 7 (9-3 m.) ; 

 {lion. Not., B. A. S., November, 1883). 



