388 Proceedings of the Royal Irkh Academy. 



No. 574. Lalaxde 36099 Aquil^. — 6|- m. Lalancle ; 7|- Bessel ; 6-a 

 in DM; 6Heis; and 6*4 to 6"7 at Cordoba. Suspected variable by 

 Grould, although included in his "Standards of Magnitude" {U. A., 

 p. 323). 



No. 575. 53 Deaconis. — 5 m. Groombridge ; 5 Harding; 6-5B[eis;. 

 Sir "W. Hersehel gives the sequence 47-54, 53. 5 m. Franks, Sep- 

 tember 4, 1877 {private letter). 



December 13, 1876. I found 53 slightly brighter than 54 (5-6 

 Heis). 



May, 1877. 53 a little less than 54, and about = 51. 



June 12, 1877. 53 about J magnitude less than 54. 



April 9, 1883. 53 one step brighter than 54, but less than o (47). 



March 7, 1884. 53 one step less than 54, and about 5*2 m. 



Wo. 576. 43 {d) Sagittaeh. — 6 and 8 m. Lalande ; 4 Harding;. 

 5 Argelancler and Heis; 5-6 Gould ("red"); 5 Franks, August 16, 

 1877 (private letter); 5 Cape Catalogue (1878-75). 4-90 H.P. My 

 observations are : — 



June, 1875. About 6 m. ; much fainter than p^ but brighter than 

 p^, and a 7 m. star/. 



November, 1875. Rather brighter ; about 5^ m. 



October, 1876. A little less than v (4*9 Goiild). 



No. 577. 24 AQTJiLiE.— 6 m. Lalande (36326); 6-7 Heis; 6-8 Gould. 

 Sir W. Hersehel' s estimates of magnitudes make it equal to 27 Aquilse 

 (6-5 Heis). Franks "components separately 7, 7, August 29, 1877" 

 (private letter). 



August, 1875. Both stars 6^ or 7 m. 



September 23, 1879. 24 Aquila3, 6*8 m. ; one magnitude less than 

 23 or 27. 



September 18, 1881. About 7 m.; at least one magnitude less 

 than 23 or 27. 



No. 578. Birmingham 492 Ctgni. — 7 m. Buckingham. Birmingham 

 says, " The position closely agrees with Arg. + 26, 3529 ; 9 mag. If 

 it is the same star it must be variable." 



No. 579, 6624 B.A.C. Ltr^. Not in Seis' Catalogue; 1\ Franks. 

 It seems to be Lalande (36503 (6|-m.) ; 7 m. Harding. 



No. 580. x' Sagittaeh (49 Fl.).— 6m. Lalande; 6 Harding; 6-7 

 Heis. Not in Argelander's Uranometria or Zones ; 6 Behrmann ; sus- 

 pected variable by Gould, from estimates at Cordoba, which vary from 

 5-6 to 6-2. 



No. 581. 31 (3) Aquil^. — 5|-, 7|- Lalande; 5 Harding; 6Eumker; 

 5 Piazzi ; 5-6 Heis ; 5 m. in Catalogue of Berlin Academy Charts, 5*4 

 and 5-6 Gould. Sir AV. Hersehel found 31 the least perceptible diffe- 



