380 Proceedings of the Royal Irivh Academy. 



jS'o. 519. Lacaille 7171 Scoepii. — 7 m. Lacaille; 7 m. Yamall 

 ( 1 869). The Cordoba estimates vary from 6^ to below (?) 7 m. ( U.A., 

 1). 286). 



No. 520. — jS'o. 282 of Burnham's Fifth Catalogue of New Double 

 Stars. Suspected to be variable by Burnbam, as it is not found iai 

 tlie catalogues of Weiss, Lalande, Eumker, 8ebjellurup, Bode, and 

 others. It was estimated 7 m. by Burnham, and twice 6-5, and once 

 7 m. by Dembowski. In one of Lamotifs Catalogues it is rated 5 m. 

 '^Ast. Register, August, 1876). In the Berlin Star Charts it is 7 m. 

 It is 6 m. in Harding's Atlas, but is not given by Heis. In the 

 Uranometria Argeniina it is 6-3 m. (jSTo. 105 of Ophiiccus). September 

 8, 1876, I found the star about 6^ m., and equal to Lalande 31289 ; 

 just visible to the naked eye on a very clear night in the Punjab. 



Franks estimated it 6 m., Hay 3, 1878. In 1880 Burnham gives 

 it 5"5 m. [Memoirs R.A.S., vol. xlvii., p. 293). 



]^o. 521. I Apodis ( = Lacaille 7156). — 5^ Lacaille; 6 and bh 

 llllery ; 5-4 Behrmann. Prom the observations at Cordoba, which 

 range from 5-1 to 6*0, Gould considers that this star is variable to the 

 extent of about a magnitude. 6 m. Cape Catalogue (1877"51). 



JS'o. 522. 69 (e) Herculis. — 5 m. Sufi; 5 Ulugh Beigh ; 4 m. 

 Tycho Brahe ; Ah Hevelius ; 5-4 Heis ; 5 Argelander. Sir William 

 Herschel found it less than 76 (A), and gives the sequences 94, 69-99 

 and 69-68; 5 m. Franks, May 3, 1878; 4-52 Pritchard (1882-376). 

 It was considered to be variable by H. T. Yivian in 1870 ; he found 

 variation from a large 5 m, to a small 6 m., with a period of about 21 

 days {Ast. Register, 1870, p. 275). 4-94 and 4-8 H.P. 



June 6, 1875, I found 69 fainter than p Herculis. 



May 14, 1883, I estimated it 4-7, fi'om comparisons Avith p and 59 

 Herculis. 



No. 523. Lacaille 7267 ApiE. — 6 m. Lacaille. Gould remarks 

 with reference to this star: — " The determinations for this object are 

 unusually discordant, suggesting the probable variability of one of the 

 three stars whose joint light is estimated. 



No. 524. 44 {I) OpHiucn.— 5 m. Lacaille (1752) ; 5 Mayer (1756); 

 4-5 Piazzi (1794); 5 Lalande; 5-5 Taylor (1833); 5 m. Argelander; 

 5-0 Gilliss (1847) ; 6-2 Argelander (1849) ; 5-5 Johnson (18^53) ; and 

 4-7 in 1858 ; 3-6 Newcomb, June 1862, and 4-2 July 1862 ; 5-0 Heis; 

 5-6 Behrmann; 4-5 Gould; Ah Franks, April 30, 1878 (> 51 Ophiucii 

 = ^ Oph.) (^j^rivate letter); 5^ Cape Catalogue. 1880; August 6, 1877, 

 I found 44 brighter than 51 Ophiucii (5 m. Heis). 4-47 H.P. 



No. 525. Lalaxde 31727 Ophiucii (Hevelius 27); 5 m. Hevelius 

 and Lalande; 6 m. Harding; 5-4 Argelander and Heis; 4'6 Gould 

 fat Albanv), and 4'5 to 5"1 at Cordoba {Uranometria Argentina, 

 p. 307). 4-68 at Oxford (1882-475); 4-62 H.P. 



