124 
Proceedings of the Royal Irish Academy, 
Schmidt observed a minimum, 1883, I^ovember 28, " Helle selir 
wenig geringer als die Nachbarsterne." Period since last minimum 
547 ± days. {A.N., "Ibll). 
ISTo. 15. S Peesei. — The maximum given in the Catalogue vras ob- 
served by the Rev. J. Hagen, s.j. (U. S. A.), mag. 7-6 {private letter). 
'^0. IQa.V Ceti. — A variable, discovered by Sav^^yer on the night 
of December 16, 1884, when it was 7*0 m. ; on January 10, 1885, it 
had faded to 8 m. ; on February 10, to 9 m.; and on March 5, 1884, it 
was only 10|-m. It rose to another maximum in 1886. The star is 
evidently an interesting variable. 
!N"o. 17. T Aeietis. — Duner finds a spectrum of the third type, 
with enormously large and dark bands in the green-blue. 
1^0. 18. p Persei. — Duner calls the spectrum "superbe." Sawyer 
found the light nearly constant during the year 1884, and with only 
slight fluctuations from August 15, 1885, to January, 1886. 
JSTo. 19. y8 Persei (Algol). — A minimum was observed by Sawyer, 
1885, December 24, 7*^21'". Cambridge (U. S. A.), M. T. 
'^0. 20. E, Persei. — Maxima were observed by Schmidt, 1883, 
January 20 (mag. 8-2) ; 1883, August 27*0 (mag. 8-5) ; and by 
Baxendell, 1884, March 5 (mag. 7'9); and October 6 (mag. 7-9) ; and 
" an unusually high maximum " of 7*7 m. on December 6, 1885. He 
finds that the period is subject to slow changes, and deduces from 8 
maxima a period of 210-06 days, with Epoch, 1870, May 16-48, and 
he finds that during the last twenty years a very sensible increase 
in the length of the period has taken place." {Proceedings, L. A. S., 
Session 1883-84.) 
ITo. 22 a. — Tauri. — A star observed by Dr. MoUer and Professor 
Vogel on the night of February 24, 1880. Spectrum Ilia, "Farbe 
rothlich Gelb, geschatzt, 9"'-2, fehlt bei Argelander." Espin could not 
find the star with 17:^-inch reflector, September 14 and 30, 1886 ; but 
on January 16, 1887, it was found by Gage, with the same telescope, 
of the 9^^ mag. ; on January 22 it was barely of the 10^^ mag., and 
from February 2 to March 3 it varied irregularly from lO'O to 8*7, 
according to the observations of Messrs. Baxendell, Espin, and Ward. 
Is'o. 23. R Tauri. — Maxima were observed by Schmidt, 1882, 
October 15 (mag. 8-3), and 1883, September 15 (mag. 8). 
