Gore — On Suspected Variable Stars. 381 



'No. 526. o- Ophiucii. — 6 m. Sufi ; 4 Harding ; 4*0 DM ; 5 m. Arge- 

 lander; 4-5 Heis ; 4*5 Gould (at Albany), and 4*7 at Cordoba, 4*45 

 Pritchard (1882'483). Dr. Gould suspects variation, although he 

 includes it in his " Standards of Magnitudes " ( U. A., p. 31). 



No. 527. 51 Ophiucii (c). — 5^, 5 Lalande (31824-5); 6 Lacaille ; 

 5 Heis; 5-6 Behrmann; 5 Pranks, April 30, 1878; 6-5 Cape Cata- 

 logue (1878"60). The Cordoba estimates vary from 4*8 to 5*6, " dimi- 

 nishing steadily from 1871 to 1874." 



No. 528 - Ae,^. — Estimated 5 m. by Tebbuttin 1862, while observ- 

 ing Comet III. of that year. It was about " a degree north-east" of 

 <T Arse, and both stars were visible to the naked eye, the supposed 

 variable being the brighter of the two. On examining the place of 

 the star with a 4J-inch refractor, on November 13, 1877, Tebbutt 

 only found stars of the 10th and 11th magnitudes near the spot. 

 One faint star particularly attracted his attention, and its position 

 agreed fairly well with that of the 5 m. star observed in 1862. There 

 are some other faint stars near the place {Mon. Not., R.A.S., March, 

 1878). 



No. 529. BiEMiNGHAM 418 Seepentis. — 8*5 Argelander. Birming- 

 ham's estimates of magnitude, 1873-1876 vary from 7'5 to invisibility. 



No. 530. Sagittarii. — A star 7 m. in Harding and Biens'' Atlas. 

 Not in Lacaille' s Catalogue. I could not see this star with the bino- 

 cular in the Punjab on July 28, 1877, and August 3, 1877. It lies 

 closely north of Lacaille 7451 (5|-) (5-5 Gould). 



No. 531. 88 (z) Heeculis.— 7^ and 8 Lalande (32758 and 32760) 

 ■6 m. Heis. Sir "W. Herschel gives 74'88. Pierce says, "I am con- 

 fident that this star is variable. It is now of the 7th magnitude, and 

 very considerably fainter than 120 Heis or 148 Heis, which Heis and 

 the DM call 6-3, but which are, in fact, hardly brighter than 6-6. 

 Yet the star was seen by Ptolemy, who makes it 5*6, in which he is 

 supported by Sufi and Ulugh Beigh. Tycho and Hevelius called it a 

 nebula. William Herschel makes it 5*9 ; Argelander and Heis 5-8 ; 

 the DM 6-4, and I, 6'9. William Herschel makes % 0*2 fainter than y ; 

 Argelander makes them equal ; Heis makes % 0'4 fainter ; tlie DM, 0'6 

 fainter; and I, 1*3 fainter. April 6, 1876, I find that my magnitudes 

 of stars in this vicinity continue to represent them very well." 



November 14, 1878. s (88) considerably less than 82 [y) Herculis; 

 s certainly less than 6 m. February 22, 1884, 88 about equal to 169 

 Heis, but much less than 82 (y) ; seems not above 6|-m: March 23, 

 1884, 88 = 169 Heis, or 6-5 m. 6-37 and 6-2 H.P. 



No. 532. BiEMiNGHAM 420 Ophiucii. — Birmingham's observations, 

 1871 to 1876, vary from 7-8 to invisibility. He says "it is certainly 



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