GrORE — On Suspected Variable Stars. 329 



ITo. 138. p Ofiiojfis. — JSTot in Lalande's Catalogue; 5m. Harding, 

 Heis, and Franks. The Cordoba estimates vary from 4*6 to 5"1. 

 4-47 and 4-8 H.P. 



March 4, 1883, 1 found p = 7r« Orionis or 4=7; March 8, 1883, one 

 step less than tt^, or 4*8. 



No. 139. a AmiiG^ (Capella). — Struve in a letter to Sir J. Herschel, 

 December, 1838, stated that he considered Capella was increasing in 

 brightness, and Sir J. Herschel agrees with him {Cape Obs., p. 350). 

 From observations made by Mr. Benedict Ellner, of Bamberg, Bavaria, 

 in 1855, he found that Capella varied in brightness (TO to TQ), and 

 also in colour (from "whitish yellow" to "red.") {Ast. Register, Sep- 

 tember, 1875). Pierce measured it 0-09 with the photometer (Seidel's 

 estimate being 0.33, and Zollner's 0-20). Pritchard 0-08 at Oxford 

 (1883), and 0-09 at Cairo (1883). 0-18 and 0-3 H.P. 



IS'o. 140. /? Okionis (Rigel). — Dr. Gould suspects slight fluctua- 

 tions of brilliancy in this bright star. At Cordoba it was sometimes 

 estimated equal to or a little fainter than a Eridani (1-Om,), while at 

 other times it was found decidedly brighter than a Centauri (0-7 m.) 

 ( U.A., p. 341 ). In Professor Pritchard' s photometer results it is rated 

 0-03 at Oxford (1883) and -0-08 at Cairo (1883). 0-32 H.P. 



ISTo. 141, 16 Atjkig^. — ISToted by me as a reddish star in November, 

 1878 {Olservatory , December, 1878); not in Birmingham'' s Catalogue; 

 Pranks estimated it 5 m., and fine orange, December 14, 1877, and 

 suspects variation, but his magnitude agrees with the estimates of 

 Argelander, Heis, and Houzeau (1875-16), who all rate it 5 m. Sir 

 "W. Herschel gives the sequence 16 , 14-19. March 31, 1884, I esti- 

 mated it 4-9 — four steps brighter than 14. 4-97 H.P. 



No. 142. B. 103 Atjeig^. — 7m. Schjellerup; 9 m. d' Arrest (non 

 utique lucidior) ; 7-8 Birmingham, February 2, 1873. Not found as a 

 red star by Webb, 1874, March 26 {Birmingham's Catalogue, p. 265). 



No. 143. 109 Tattbi.— 5i , 6 Lalande (9909-10) ; 6 m. Argelander ; 

 6-5 Heis; 5-6 Houzeau (w) (1875-13); 5m. Franks, "pale yellow" 

 = 114. I found 109 one step less than 114 Tauri (6 m. Heis) February 

 3, 1884; February 14, 1884, two steps less than 114, and one step 

 less than 97 Taiui. 5-15 and 5*3 H.P. 



No. 144. 21 Oeionis.— 6 and 5-|- Lalande (9953-4) ; 5 Harding ; 6 

 Heis ; 6 m. Franks, December 13, 1877. The Cordoba estimates ^ary 

 from 5-6 to 6-0. November 24, 1878, I found 21 brighter than 

 Lalande 9878 ; March 4, 1883, 21 two steps brighter than WB 64 (6-3 

 Gould; February 22, 1884, 21 = 38, but brighter than 33 Orionis, or 

 5-8 m. ; March 23, 1884, 21 = 33, or 6-0. 5-37 and 5-6 H.P. 



