382 Proceedings of the Royal Irish Academy. 



variable." Webb also suspects variation, and failed to see the star on 

 two occasions, August 7, 1871, and September 22, 1873 ; May 2, 1878, 

 not seen with binocular. 



No. 533. Lalande 32847 Sagittaeii.— 7^ Lalande ; 6-7 Heis ; 7| 

 Gould {U.A., p. 291). 



IS'o. 534. Birmingham 422 Ophiucii. — 7 m. Bessel. Birmingham's 

 observations, 1872-1876, vary from 7 to 8"5. It lies s.p. 67 Ophiucii 

 (4m. Heis). 



Ifo. 535. 65 OpHnjcii. — This star is supposed to have disappeared, 

 as it was duly observed by Flamsteed, on May 6, 1691, at 14^ 10" 58"^, 

 and the observation regularly reduced by him. 'Eo such star is now 

 to be found. It was looked for at Greenwich, but without success. 

 There is no star in the position in Argelander's Southern Zones, nor in 

 the Washington Zones. It has been suggested tliat Plamsteed may 

 have observed a so-called "temporary star" [Nature, March 15, 

 1877). 



The star is not in Lalande' s Catalogue or Harding's Atlas. 



JSTo. 536. DM 45°, 2627 Heeculis (= Lalande 33006-7).— 6 and 

 4Jm. Lalande; 6'1 DM ; 6*21 Pierce, who says {Harvard College Annals, 

 vol. ix., p. 141), "I believe this star to be variable. I found it the 

 brightest of the group except 182 Heis Herculis, and yet neither 

 the JJranometria nor Heis has it. My measures show some discrepan- 

 cies, even rejecting that of set (19), which is affected by a large 

 colour correction. The star is remarkably ruddy." It is not in Bir- 

 mingham's Catalogue of Red Stars. 



March'23, 1884. I estimated it 6-9 — three steps less than 179 Heis. 



]S^o. 537. 68 OpHiircii.— 5|- Lalande (33027); 4-5 Ai'gelander; 

 5-4 Heis. Bated 4"4 in the Albany observations by Gould, but only 

 5*1 at Cordoba. Gould suspects variation, although he includes it 

 among his " Standards of Magnitude" {U. A., p. 31). 



October 21. 1876. I found 68 equal to 70 Ophiucii (4-2 Gould). 



No. 538. TT Pavonis. — 4 m. Lacaille (7527) ; 4*5 Behrmann, In 

 the Paramatta Catalogue there is a remark with reference to this star. 

 "The observer suspects this star variable." In the Cape Catalogue 

 (1880) Stone remarks, "This star is probably variable. It was ob- 

 served in 1871, and again in. August 25, 1875, when it was noted as 

 of the sixth magnitude." Dr. Gould, however, says, "Not the least 

 variation from the magnitude 4'6 has been observed at Cordoba, 



No. 539. y Sagittaeii. — 3^ Lacaille; 3-4 Heis and Behrmann; 

 2-8 Gould (1872, 1874) who says it "seems somewhat variable with 



