GrORE — On Known Variable Stars. 187 



94. S BooTis. — Period derived by Schonfeld from 15 well-deter- 

 mined maxima since 1853. An observation by Lalande, 1790, February 

 21, is well represented by the Elements. The maximum of 1874 alone 

 shows a difference of only 5*8 days. 



95. E, Camelopardi. — According to Schonfeld, the observations 

 show differences up to 24 days, and a very variable velocity of light 

 change. 



96. E, BoOTis. — According to Schonfeld, his Elements represent 

 the maxima and minima well. Schmidt, however, makes the period 

 229 days, with a maximum, October 21, 1876. 



97. 8 LiBK^. — A variable of the type of Algol. The variation 

 occupies about 12 hours, of which the decrease takes 5^ hours. The 

 period is, according to Schonfeld, affected by inequalities, which 

 Schmidt considers may be i-epresented by a 9 years' cycle. Minima 

 were observed by Schmidt in 1882, on May 17, lO'^ 17™-8, and June 

 14, 10*^ 0"'-8, Athens MT. The error of Schonfeld's Ephemeris was 

 in May, 1877, 32 minutes, and in 1878, 48 minutes. Schmidt's ob- 

 servations in 1878 show a well-marked increase in the periofl. 



98. T Trianguli Austealis. — Yariable according tu GuuUl, ^vitll a 

 "period which differs little from a mean solar day." He designates 

 this star as T, reserving S for another star (No. 487 of Catalogue of 

 Suspected Variables), which he believes will prove to be variable 

 {U. Argentina, p. 260). 



99. E, Teiingxtli AnsTRALis. — Gould finds the most probable period 

 to be 3"^ 9™'35, the minimum preceding the maximum by about 48 

 hours. He considers the period to be nearly a constant one. Epochs 

 of Maxima, 1871, July, 14^^ 14^ and 1871, September, 13M2'^; and of 

 Minima, 1871, July, W 14i^ 1871, September, l-^ 8i^ and 1872, 

 July 29, 12*^ 15™. 



100. U Corona. — A variable of the type of Algol. Decrease of 

 light about 4^ hours ; increase 5*2 hours. Some minima show devia- 

 tions of 23 minutes from the mean period. Schmidt observed a Mini- 

 mum, 1882, November 6, at 6''-6. 



101. S LiBR^. — Schonfeld gives periods of 187 days, with a 

 maximum on 4th February, 1873 ; and 193 days, with a maximum on 

 17th June, 1874 ; the latter more probable, but both only approximate. 

 He notes a 13 m. star np. and a 12 m. nf. 



The variability of this star was also observed by Prof. C. H. F. 

 Peters, 1868-1880 (Ast. Nach., 2360, No. 4). He notes two small 

 stars forming an equilateral triangle [fileichserUges JDreiech), with the 

 variable. Peters deduces a period of only 98 days. 



