332 Proceedings' of the Royal Irish Acadeiny. 



Xo. 161. IS'ear 6 Omoyis.— This is JSTo. 822 of Bond's Catalogue of 

 Stars in the great Orion nebula. In April, 1878, it was observed by 

 Schmidt to vary from 9-7 to 12-8 m. The variability was also detected 

 by Common in 1883. 



There are several other faint stars suspected of variation in the 

 vicinity of the "trapezium" (see Olservatory , j^ovember and De- 

 cember, 1880). 



The 5th. and 6th. stars of the "trapezium" have also been sus- 

 pected of variability by 0. Struve and others, but Bumham considers 

 that there is no evidence of change. 



]^o. 162. o- Oe-ioxis (CojiEs). — The 11 m. star preceding the prin- 

 cipal star of the group. It escaped observation by Sir W. Herschel, 

 but it has been seen by "\^^ard with 2-| inches aperture ; and I found it 

 plain enough with 3'9 inches in the Punjab, 1874. In March, 1883, 

 Basendell observed it of unusual brightness. 



No. 163. a CoLUiiB^. — 2 m. Lacaille; 3*lo Sir. J. Herschel (a 

 Hydri = 3-44). Estimated 2*9 at Cordoba in 1870, and 2-4 in 1872- 

 73 (£7: Argentina, p. 292). 



jSTo. 164. BiRiiixGrHAM 118 OEioJfis. — 8 m. Lalande (10785); 8 

 Bessel ; 7*7 Schjellerup ; 7-8 Argelander ; 6-8 Gould; 7*3 Birmingham, 

 who says "blue in several observations." Schjellerup noted its colour 

 as "roth," but afterwards found it "not red." Gould says "the 

 colour is decidedly red" {JJranometria Argentina, p. 330). 



Ko, 165. BiEirixGHAiir 120 Tatjei. — 8-5 Argelander ; 8 m. Marhree 

 Catalogue. Birmingham's Ohservations 8 to 9" 5. He says, "Deci- 

 dedly variable." It is not in Lalande's Catalogue. 



No. 166. BiEirEvGHAii 121 GEiiES'OErir. — 7'7 Argelander; 8 m. 

 Marh'ee Catalogue. Birmingham'' s Ohservations, 1876, 7"7 m. (Janu- 

 ary 21) ; and 7 m. (February 19). He says, " Probably variable." 



No. 167. 132 Tatoi.— 41 5*, and 6 m. Lalande (10966-8); 5 

 Harding; 5-6 Heis) ; 5 Pranks, December 14, 1877. Not 'wi. Bir- 

 minghamh Catalogue. I have observed this star as follows : — 



February 18, 1878, 132 brighter than 139 (5-6 Heis)— of an 

 orange hue with binocular ; November 21, 1878, 132 rather less than 

 139 ; very slightly brighter than 125 (6 Heis); December 21, 1878, 132 

 about J mag. less than 139, and about- 125; January 11, 1879, same 

 relative magnitudes as on December 21, 1878 ; February 8, 1880' 

 132, about two steps less than 139, but two steps brighter than 125 ; 

 December 30, 1883, 132 two steps less than 139, but two steps 

 brighter than 125. 5-09 and 4-9 H.P. 



