458 Scientific Proceedings, Royal Dublin Society. 
Satellites of Saturn—The orbit of Hyperion has been in- 
vestigated anew by Hall,* who has discussed all the available 
observations. The result is a retrograde motion of the line of 
apsides of 2°93 a year. The unfavourable circumstances under 
which this satellite has been observed since 1875 (the observer 
being nearly in the plane of the orbit) prevent, however, any 
certain conclusion being arrived at at present. The action of 
Titan may possibly make the apsides move rapidly in the opposite 
direction, as suggested by Mr. Marth some years ago. 
A fine series of observations of all the satellites except 
Hyperion, made in 1878 at Mr. Seagrave’s observatory at Provi- 
dence, R.IL., with an eight-inch Clark refractor, is published in the 
A.N. 2254, It includes four observaticns of Mimas. The con- 
junctions with the ring and the ball were observed in 1878 by 
Professor Pritchett of Glassgow, Missouri. Mr. Marth has again 
in 1879 published ephemerides for this kind of observations. 
Minor Planets—The following discoveries were made in 
1879 :-— 
Date. | No. Name. Discoverer. 
February 17, .| 192 | Nausika. Palisa. 
7 8, .| 193 | Ambrosia. Coggia. 
March 22, . .| 194 | Procne. Peters. 
April 28, . .| 195 | Euryclea. Palisa. 
Wien? 17 6 .| 196 | Philomela. Peters. 
a valle 5 : 197 | Arete. Palisa. 
June 13, . .| 198 | Ampella. Borrelly. 
July 9, ; .| 199 | Byblis. Peters. 
Suds an we .| 200 | Dynamene. Peters. 
August 7, . - | 201 | Penelope. Palisa. 
September 23, .}| 202 | Chryseis. Peters. 
5 27, .| 203 | Pompeia. Peters. 
October 8, . .| 204 | Callisto. Palisa. 
5 ley > .| 205 —_— Palisa. 
eaeellovir - | 206 | Hersilia. Peters. 
aye alidiats -| 207 -- Palisa. 
premeles si) 2s ae Palisa. 
0 eS -| 209 | Dido. Peters. 
November 12, 5) Alo) a Palisa. 
December 10, d | 211 — Palisa. 
CO. H. F. Peters has now discovered 40, Palisa 24, of these small 
bodies. The magnitudes at the time of discovery range between 
105 (8) and 12 (13). One (No. 208) was of the 13th magnitude. 
Frigga (77) was refound by Peters on July 17, after having been 
at large for several years. 
* A.N., 2263. 
