GrORE — On Suspected Variable Stars. 391 



No. 596. X AQTJiLiE. — 5 and 5i Lalande ; 6 m. Bessel ; 5-7 D.M. ; 

 6 Argelander; 6-5 Heis ; 5-7 Gould at Albany, and 5*8 at Cordoba. 

 Sir "W. Herschel gives 47 (x) • 52 (tt), and 47, 46. Dr. Gould suspects 

 variation, although he includes it in his "Standards of Magnitude" 

 {V. A., -p. 33). 5-40 and 5-8 H.P. 



August, 1875, I found x = "A) Aquilae. 

 October, 1876, a little brighter than xf/. 



l^ovember 17, 1883, x three steps brighter than tt, and four steps 

 brighter than ij/. 



'No. 597. Birmingham 510 AaxriL^ = Laxande 37504 (74- m.). — 



9 m. Bessel; 8 m. Schjellerup ; 8-5 "Wolf ers ; 7 m. Birmingham, Sep- 

 tember 23, 1874; 9 m. Webb, September 25, 1873. 



No. 598. D.M. 41°, 3469 Cygni (= Laxande 37619-20).— 6 m. La- 

 lande and Harding. Suspected variable by Peirce, who says (JTarvard 

 College Annals, vol. ix.), "Although I make this star 5-6, and the D.M. 

 marks it 5-8, it is omitted by both Argelander and Heis, and its varia- 

 bility is highly probable. When I first observed it, it seemed brighter 

 than 14 Cygni, but I think its light afterwards diminished." 



November 25, 1878, I found it about half a magnitude less than 14, 

 but slightly brighter than a star n.f. 14. 



October 5, 1879, rather more than half a magnitude less than 14. 



November 12, 1882, much less than 14, but two steps brighter than 

 the star n.f. 14. 



No. 599. Lalai^de 37621 Ctgsti. — 6 m. and 7 m. Lalande ; 6 Hard- 

 ing, suspected variable by Herr Kohl of Copenhageu, in March and 

 April,. 1878, when he found it a whole magnitude fainter than a star 

 to the south of it. " Formerly he had observed them to be equal, and 

 they are so given by Argelander." The southern star seems to be 

 Lalande 37584-5 (5^ and 6), 6 m. Harding. 



April 30, 1883, I found the star more than half a magnitude fainter 

 than the star to the south. If it ever equalled this star in its present 

 brightness, it must certainly be variable. 



August 30, 1883, about the same magnitude. 



October 14, 1883, one magnitude at least less than the star s of it. 



October 19, 1883, at least one magnitude less than the star s of it. 



No. 600. P. XIX. 276 Ctgni.— A double star, 8, 8-5 : 126°-5 : 15". 

 Dembowski considered the components variable. 



No. 601. BntMiNGHAM 514 Cygisti. — Observed by Birmingham as 



10 m. and red, August 19, 1870. This observation was confirmed by 

 Webb, September 1, 1870, but the star was not seen subsequently. 



No. 602. TT Aqtjil^. — 7 m. Bessel ; 5*8 D. M. ; 6, Argelander and 

 Heis ; 6-1 Gould (at Albany), and 66 at Cordoba. Suspected variable 



