GroRE — On Sitspecfed Variable Stars. 389' 



rence brighter than 28 Aquilae. Piazzi says, with reference to 31, 

 " Seqnitur alia 7 mag. 4' ad Boream," 5 Franks, August 29, 1877 

 (private letter). My observations are : — 



August, 1875. 31 very slightly brighter than (o\ 

 October, 1876. Slightly less than w\ 

 August 1, 1877. 31 slightly brighter than w\ 

 April 24, 1878. 31 equal to u>\ but brighter than 28 and w^ 

 September 23, 1879. 31 slightly brighter than w^ ; about ^ a mag., 

 brighter than 28 ; 31 about = 18. 31 is 5-30 and 5-5 H.P. 



No. 582. Lalande 36606 Sagittaeii. — Eated 8 m. by Lalande and 

 Piazzi; 6"5 m. by Argelander, October 17, 1852. In the summer of 

 1851 it was seen about 9 m. {Nature, January 10, 1878). It is 8 m. 

 in Harding'' s Atlas. It is not in the Zfratiometria Argentina. 



No. 583. BiEMiNGHAM 498 Aquil^ ( = Arg. 1° 4004).— 8-5 Bir- 

 mingham, 1876, August 10. " Variable (?) " 



No. 584. Lalande 36781 Aquilae. — Bated 7 m. by Hencke ; 7 Bes- 

 sel ; 6"0 DM ; 6 Argelander and Heis ; and 6'6 at Cordoba. Gould 

 suspects variation, although it is included among his Scandard of 

 Magnitudes" {U. A., p. 33). 



No. 585. a VuLPEcuL^. — 4i- and 5 Lalande ; 4-5 Heis ; 5 Pranks 

 (1877); 4-58 Pritchard (1882-604). 



No. 586. Lalande 36863 Aquil^. — 7 m. Lalande. Gould's estimates 

 vary from 6"3 to 7'2. It is 49 Heis Aquilse (6-7). Not in Argelan- 

 der\ Uranometria. It seems to be identical with the double star P 

 xix. 144 = 2 2532 ; 7, 11 : 4°-9 : 37" (1838), respecting wljich Smyth 

 says {Bedford Catalogue, p. 449), "A and B point nearly upon a 9th 

 magnitude star in the ?^/ quadrant." Knott in 1862 failed to see this 

 9th magnitude. 



July 4, 1877, I found LL 36863 less than LL 36890, which lies 32' 

 to the north of it. 



No. 587. 36 {e) Aquil^ (= Birmingham 500). — 5, 5^ and 6 La- 

 lande ; 7 Lamont ; 6 Bessel ; 5"5 Schjellerup ; 5-6 Heis ; 5'6 Gould. 

 Sir "W". Herschel found 36, 42 and 36-45. Birmingham's estimates 

 are:— 7 m. April 18, 1873: 6 m. July 14, 1876. Webb 5 m. 1873, 

 September 26; Burton 6-5, 1876, July 22; 7-5 July 24, 1876. My 

 observations are : — August, 1875, 6 m. ; October, 1876, and xiugust 1, 

 1877, 6 m. ; September 33, 1879, red with binocular, and 5"5 m. ; 

 September 18, 1881. 5-5 m. 



No. 588. Birmingham 502 Deaconis = Lalande 37241 (7*5). — 6-5 

 Argelander ; 8 m. Pedorenki. Birmingham's observations, 6 to 6*5, 

 1872 to 1876 ; 9 m. Burton, 1876, July 1 9. 



March 4, 1884, I estimated it 7 m. -more than a magnitude less 

 than 59, but one step brighter than 56 Draconis. 



