Gore — A Revised Catalogue of Variable Stars. 137 
JS'o. 153. S. YuLPECUL^. — The mean period given in the Catalogue 
was derived by J. Baxendell, jun., from a discussion of nineteen observed 
maxima, 1863-1885; and20 minima, 1863-1885. The period seems 
to have diminished very slightly between the years 1868 and 1884, 
but since the latter year it has returned to its original length. The 
i increase of light is much more rapid than the decrease, the former 
I occupying about 20*6 days, and the latter 47*19 days. {Observatory, 
March, 1886.) Maxima were observed by Eaxendell, 1885, July 1 
f (mag. 9*2), September 11 (mag. 9-1), and JiTovember 20 (mag. 8-9); 
and minima, 1885, June 12 (mag. 9-8), August 20 (mag. 9'7), and 
[ October 30 (9-75 m.), {Olservatory, April 1886), and 1886, December 
15.) 
1^0. 154. X C^cf^i- — The maximum given in the Catalogue was 
i-observed by Sawyer, and Gore. The star was again at maximum, 
1886, January 20, according to Sawyer. 
JS'o. Ibb a. S (10) Sagitt^.. — A short period variable, discovered 
!by Gore in 1885. Owing to its proximity to a good comparison star 
- — 11 Sagittse — the variation of light, although small, is very e^ddent, 
;;and the changes are very interesting. Espin remarks that the star is 
fabout four days visible to the naked eye, and four days invisible. 
iFrom a discussion of all the available observations to May, 1886, 
(Chandler finds the following elements : — 
IMax. = 1885, December, 4"^ 9^ 36"^, Gr. M. T. + 8^ 9*^ ll"--0 (E - 391) ; 
•or, reckoned from the Julian epoch. 
Max. = 2409880-40. Gr. M. T. + 8'^'38264 (E - 391). 
Duration of increase = 3'^-00. 
,, ,, decrease = 5'^'38. 
{A. N,, 2749.) 
In the above formulse, 391 is the number of the given epoch, 
reckoning from an observation by me, 1876, December 14, when the 
star must have been near a maximum. 
1^0. 155 I. — Cygni. — A red star, discovered by Espin, March 23, 
1887, 7-5 mag. 5^ f, and 3' south of 26 Cygni. It is not in the 
' DurcJimuderung ^ or any other Catalogue. On March 28, Baxendell 
estimated it 7'1 m., and on April 14 it had decreased to 8*0 m., and 
I on Mav 9 to 9-2 m. 
