318 Proceedings of the Royal Irish Academy. 



'Eo. 58. 66 Ceti. — 6|- and 6 m. Lalande ; 7 Piazzi ; 7 Harding; 

 6-7 Heis. Not in Argelander's JJranometria ; 6J m. Armagh Catalogue ; 

 6 m. Franks, and = 63, November 28, 1877. Sir W. Herschel found 

 the sequence 58, 66, 63; 6-7 Cape Catalogue (1878-96). Gould finds 

 no evidence in support of variation. 



November 16, 1876, I found 66 about half a magnitude brighter 



than 63, 

 October 21, 1878. Same relative brightness. 

 September 27, 1883. Estimated 5'6 m. - 4 steps brighter than 63. 



No. 59. Lacaille 691 Hibei. — 6 m. Lacaille, but found only l^m. 

 at Cordoba. 



No. 60. Lalande 4339 Peesei.— 8 m. Lalande ; 6-4 D M ; 6-7 

 Heis. Estimated 8 m. by Talmage at Leyton, November 25, 1880, 

 while observing Swift's comet of that year. On January 7, 1882, I 

 estimated it 6-4 m. — about equal to a star n.f. (20 Heis Persei). 



No. 61. 740 B.A..C. Cassiopeia. — With reference to this star, 

 Bailey remarks, " Piazzi considers this star to be of the 8th magnitude 

 only; it was observed by Croombridge (506), who says it is of the 6th 

 magnitude ; it was likewise observed by Pond " (74). In Nature, 

 July 15, 1875, it is stated that "other estimates are: — Hevelius 6; 

 Eedorenko (Lalande, 1789, November) 8; Piazzi 8, by 7 observations ; 

 Schwerd 8i ; Taylor, in 1834 or 1835, 7 (he calls the star 21 Cephei) ; 

 Carrington 8'I ; the Hadcliffe Catalogue 7 '5 ; and. Durchmusterung 8-4t." 

 It was rated 6 m. by Eranks, November 30, 1877. On Eebruary 14, 

 1880, I found a small star about 8|- m. near the position ; March 14, 

 1884, small star near position of 740 B.A.C. very faint with binocular, 

 below 9 m. ; March 29, 1884 — about 9 m. — faint with binocular, in a 

 clear sky. 



No. 62. P. II. 89 Teiangitli (= 13 F = S 269).— A double star, 

 6-5, 10:342°-1 : 2"-3. Webb says, ''6-5 var. (?)" Heis naked eye, 

 ''Fl. slow bin (?)." 



No. 63. 15 Teianguli = 786 BAC.~6i Lalande (4762); 6-5 

 Heis; 6 m. Franks, November 29, 1877. In the notes to the BAC, 

 Baily remarks, ' ' Argelander has considered this star to be of the 

 5th magnitude, whilst Bradley and Piazzi reckon it of the 8th. No- 

 vember 20, 1876, I found 15 slightly brighter than 14 Trianguli ; 

 November 15, 1878, 15 very slightly brighter than 14; October 6, 

 1879, 15 and 14 exactly equal; December 30, 1883, 15 and 14 

 exactly equal. 5*60 H.P. 



No. 64. 79 Ceti.— 7 m. Lalande (4810); 6-7 Heis. Not in 

 Argelander's Uranometria ; 7*0 Gould; 6-7 Cape Catalogue (187 8' 99). 

 (Closely »./. is an S^m. star, Lalande, 4821.) Eebruary 17, 1884, 

 I found 79 below 7 m. — more than half a magnitude less than LL 

 5008 (6-5 Gould). 



