192 Proceedings of the Royal Irish Academy. 



and August 27 ; and easily seen on the following dates, when he com- 

 pared its brightness with that of neighbouring small stars: — 1876, 

 July 11 ; 1880, April 20, May 3, 6, and 11. He assigns no period. 



121. g (30) Heeculis. — According to Schonfeld, the light changes 

 are very irregular, with periods of 40 to 125 days. 



122. T Ophitjcii. — Schonfeld could not find this star, although he 

 searched for it on several occasions. Winnecke observed maxima, 

 1869, January 26; 1870, January 31 (doubtful); and 1874, February 

 6 ; and from these observations, Schonfeld finds a period of either 

 116-6 days or 359 days. 



123. S Ophiucii. — According to Schonfeld, the Elements show 

 irregular deviatiations up to 9^ days. The light curve is very variable. 

 The increase and decrease of light 14 days before and after the maxi- 

 mum nearly equal ; afterwards the latter slower. 



124. Y Heeculis. — This star was observed by Duner as 8*3 m. in 

 June, 1879. A year later it was about a magnitude fainter ; and it 

 afterwards steadily decreased to the 11th magnitude. There seems 

 to be very little doubt of its variability to the extent of about 3 

 magnitudes. The star is not in Lalande's Catalogue. 



123. R TJes^ MiifORis. — Discovered by Professor Pickering, on 

 September 13, 1881. Eed, with a banded spectrum. Maximum 

 towards the end of September. It precedes the star D M 72°, 735, 

 I'" 50^-5, and is 10' 18" south of it. 



126. S Herctilis — The Elements, according to Schonfeld, show 

 deviations of 16 days at minimum, and 25 days at maximum. A 

 retardation in the increase of light usually takes place 1 to 2 months 

 before the maximum, after which the decrease is very quick. A 

 9-7 m. star sf., and a 6 m. nf. The latter star is 49 Flamsteed. 



127. jN'ova Ophiucii (1848). — When first noticed by Hind it was 

 about 5 m. It afterwards rose to nearly 4 m., but very soon faded to 

 10 or 11 m. Hind is convinced that, up to April 3 or 5, no object of 

 9*5 m. or brighter was visible in its position. There are several small 

 stars near the place of the Nova. This curious object has become very 

 faint of late years. In 1856, it was 10 m. ; 1866, 12 m. ; and in 1874 

 and 1875, not above 13 m. 



128. E OpHiucn. — According to Schonfeld, a period of 302-1 days 

 would also represent the observations, including the first, by Lament, 

 June 22, and July 9, 1847. 



