GrORE — On Suspected Variable Stars. 345 



If D was ever equal to C, as expressly stated by Smyth, it must 

 certainly be variable. 



Pollux itself has often been suspected of Yariation, as some of the 

 early observers have rated it below Castor, while at the present time 

 Pollux is decidedly the brighter by about half a magnitude. Sufi 

 (tenth century) rated both stars as 2 m. 



ISTo. 240. Lacaelle 2932 Pm'Pis= 1 Plamsteed. — 6 m. Lacaille ; 5m. 

 Argelander ; 6 m. Heis ; 5 m. Behrmann. The Cordoba estimates 

 vary from 4-8 to 5'6. In March, 1876, I found this star equal to^ 

 Puppis (Lacaille 2867, 5-3 m. Gould). 



No. 241 TT (11) Cajtis MiiiroEis. — 'Not in Zalande's Catalogue. Sir 

 "W. Herschel 6,11,1; 5-0 in Burchnusterung ; 5*3 and 5-6 Goald ; 5|- 

 Franks (> 1) January 28, 1878 ; 6 m. Harding ; 6-5 Heis. 5 46 H.P. 



In March, 1876, I found it about one magnitude brighter than 1 

 Cards Minoris, and almost exactly equal to 6 (5 m. Heis; 5-0 Gould). 

 February, 1877, a little less than 6 Canis Minoris ; ISTovember 22, 1883, 

 four steps less than 6, or 5'4 m. ; March 22, 1884, 5'4 m., three steps 

 less than y Can. Min. 



No. 242. Stexjve 1143 Cai^is Minoeis.— A double star, 152°; 9"-34 

 measured by Struve (1825-21), but never afterwards seen. Burnham 

 carefully searched for it 1874-5, with 6-inch refractor, and in 1881 

 with 1 8|-inch, but without success, and he thinks there must have 

 been some error in Struve' s place. 



No. 243. No. 36 of the "Addenda" to Birmingham'' s Catalogue. — 

 = Arg. + 33° , 1601 (6-5); 6i Lalande (15200); 6 m. Burton, with 

 small comes; 7'5 m. Birmingham, March 4, 1877. He says, "Pro- 

 bably variable in. colour and magnitude." It was rated 6-7 by Heis 

 (No. 98 of Gemini). 



February 21, 1884, I estimated it 6-1, two steps less than 70 Gemi- 

 norum, but three steps brighter than 86 Heis Geminorum. 



No. 244. C Cajs'Is Minoeis. — 5 and 6 m. Lalande ; Sir "W. Herschel 

 gives ^-14; 6 m. Argelander ; 5-6 Heis; 5 m. Houzeau (1875-18); 

 5-7 Gould; 5 m. Franks (January 23, 1878). In March, 1876, I found 

 it a little less than the star Lalande 15695-6. 



November 22, 1883, ^ 4 steps brighter than Canis Minoris ; March 

 21, 1884, estimated 5-5 ; March 31, 5-5. 4-99 and 5*3 H.P. 



No. 245. BiEMiNGHAM 192, Cahelopaedi. — Not seen by Birming- 

 ham, 1873; " slight red tinge," January 13, 1874; not seen January 

 21, 1876. Birmingham says, " Knott failed to see it, June 25 and 

 August 3, 1866. Possibly variable.'^ 



