376 Proceediiigs of the Royal Iriah Academy. 



^STo. 485. 39 Seepextis. — Smyth says {Bedford Catalogue, p. 350), 

 " 39 Serpentis lias been suspected of variability, and was even mis- 

 taken for Harding's variable stai', Tvliich is 2° north of it." He gives 

 its magnitude as 1^ (after Piazzi^; but Heis sa"^ it with the naked eye, 

 and rated it 6-7. It is not in Argelander's TJranometria. It is 7 m. 

 in Lalande's Catalogue (28935). 



No. 486. 4 TJes^ Mixoeis. — 4 m. Ptolemy and Sufi; 4-5 Arge- 

 lander and Heis; 4-65 Pritchard (1882'708). Espin finds variation 

 fi'om 4-2 to 4-7. 4-49 H.P. 



.Xo. 487. Lacaille 6578 Teiaxgtjli ArsiEAiis. — Dr. Gould thinks 

 this star certainly variable, and reserves for it the designation S. Tri- 

 anguli Australis, to be assigned to it when its changes "have been 

 fully demonstrated" ( fT". ^.^ p. 260). 



No. 488. H.ir. 26°, 2760 CoEox^.— 9-1 in Burchnmterung . Dr. 

 Gould says [A. N., 1620) "the variation of another of our comparison 

 stars, (for T. Corona) Argel. Biirchimderung 26°, 2760, is, I think, 

 beyond reasonable doubt." He estimated its magnitude 8"9. 



jSTo. 489. y3 ScoEPn. — 3 m. Sufi; 2 Argelandar and Heis; 2-96 Sir 

 J. Herschel; 2-5 at Cordoba (" dpi. 2i 7|"); 3 m. Franks, April 12, 

 1878 {private letter). Suspected variable by Kirch in 1704. He found 

 changes in the relative brightness of /5 and 8 Scorpii ; sometimes yS and 

 sometimes S being the brighter {Nature, December 30, 1880). 



It is a double star (2, 5-5 : 24°-9 : 13"-1), and Smyth says {Bedford 

 Catalogue, p. 353), "the two point nearly to a 5th magnitude star in 

 the nf quadrant." "With reference to these companions, Powell re- 

 marks : — "It would appear that a variation has occurred in the rela- 

 tive brilliancy of A, B and C. The Cycle arranges them thus : — 



A = 2, B = 5i and C = 5 ; 

 while I rank them A = 2i, B = 5, and C = 7." 



Powell gives for C, P"= 31°-08, D = 520"-4. Dr. Gould gives 2^, 

 and 7f {Uranometria Argerdina, p. 175). 2-91 H.P. 



August 10, 1876. I found y8 and S almost exactly equal; perhaps 

 8 very slightly the brighter of the two ; both sKghtly superior to 

 77 Scorpii (3 m. Heis) ; ^ and S seem nearer 3 m. than 2 m. 



August 22, 1876. ^ Scorpii, a little less than r} Ophiucii (2-3 

 Heis), and about equal to 1 Ophiucii (3-2 Heis). 

 August 6, 1877. j3 Scorpii slightly less than 8. 



No. 490. 67 Heis Deacoxis. — 6-7 Heis, and identified by him with 

 No. 1801 of Argelander'' s Catalogue of Stars, between -2° and + 90'"' 

 declination. I found this star only SA-m., November 24, 1878, and 

 April 8, 1883. It lies a few mmutes following 5248 B.A.C. (No. 481 of 

 tbis Catalogue). If it was ever visible to the naked eye, it must 

 certainly be variable. It is not in Argelander^s Uranometria. 



