406 Proceedings of the Royal Irish Academy. 



September 18, 1881 ; and IN'oyember 6, 1882. One of the two stars is 

 possibly variable to a small extent. 



'Eo. 699. 45 Heis Laceet^ = 7995 B.A.C. — Suspected variable bv 

 Pierce, who says, " This is a reddish star, and there is a difference of 

 1"3 between the magnitudes of the Uranometria and DurcJimustenmg ." 

 It is 5 m. in LaJande's Catalogue (44897), and 7 m. in Harding's Atlas. 

 IS'ot in Birmingham'' s Catalogue. Pierce gives the following estimates 

 of magnitude: — 5"8 Argelander ; 5-4 Heis; 4'5 DX; 5*16 Pierce. 

 August 23, 1883, From comparisons with 3 and 5 Andromedae, I esti- 

 mated the mag. at 5*2 (or midway in light between 3 and 5). 5-17 H.P. 



^0. 700. 51 Pegasi.— 5 m. Lalande (44894) ; 6 Harding. Sir W. 

 Herschel gives 56-51, 60; 6-5 Heis; 5^ Pranks, October 17, 1877 

 ("> 40, 41 or 45 "), {frirate letter). 5-55 H.P. 



September 10, 1883, 1 estimated this star at 5'8 — brighter than 40, 

 41, or 45. 



ISTo. 701. EiKiitNGHA.il 625 AarAsn. — Secchi found this star "8 

 and 9 Dec, 1868, rose-coloured, and not full red — an undeniable 

 change in the spectrum since last year " [Notes to BirrmngTiam^ s Cata- 

 logue., p. 324). 



iS'o. 702. a Pegasi. — 2-3 Suii ; 2 Argelander and Heis; 2*65 Sir 

 J. Herschel {Cape Ohs., p. 440); 2+ Pranks, Oct. 15, 1877. It has 

 been suspected of variation {Observatory, April 1879, p. 420); 2-57 

 Pritchard (1882-895). 2-61 and 2-5 H.P. 



jSTo. 703. bb Pegasi. — 5 and 5^ Lalande (45214-5); 5 Heis; 5 

 Pranks, October 29, 1877; 4-5 Gould. Sir W. Herschel gives 55, 59. 

 The four stars 55, 57, 58, and 59 Pegasi, form a small trapezium a few 

 degrees south of a Pegasi. I have observed the following sequences 

 in these stars : — 



October 8, 1879, order of brightness 55, 59, 58, 57. 



September 18, 1881, order of brightness, 55, 59, 58, 57; 58 and 

 57 nearly equal, and 57 red. 



jS'ovember 6, 1883, order of brightness, 55, 59, 57, 58; 59 and 57 

 nearly equal, and 58 decidedly the faintest of the four ; 57 orange, and 

 about one and a-half steps brighter than 58. 



September 4, 1883, sequence 55, 59, 57, 58. 55 is 4.65 in H.P. . 



ISTo. 704. - 56 Pegasi.— 5 m. Lalande (45224-5) ; 5 Heis ; 5i 

 Pranks (1877). Sir ^'- Herschel gives 62 (t) - 56 - 51, and 56, 64.* 



September 10, 1883, I found 56 = o Pegasi, but one step less than 

 T Pegasi, or about 5 m. 4-89 H.P. 



JSTo. 705.-57 Pegasi. — 6 m. Lalande ; 5-6 Heis; 5-4 Gould. Sir 

 W. Herschel gives 58, 57. 5-45 and 4-9 H.P. 



October 21, 1878. I found 57 less than 58 and 59. 



October 8, 1879. 57 less than 58 Pegasi, but slightly brighter 

 than 52 Pegasi. 



September 18, 1881. 57 very slightly less than 58 Pegasi. 



jSTovember 6, 1882. 57 about \\ steps brighter than 58. 



