102 TRANSACTIONS OF THE [MAR, 2, 
On vy Virginis considered as a Revolving Double Star. By W. Doberck. 
I., 148. A discussion of observations of this pair extending from 
1718 to 1881. 
XIX. RED STARS. 
Red Stars, List of, observed at the Washburn Observatory, University 
of Wisconsin, Madison. By Edward S. Holden. I., 176. 
Red Stars, Markree Observations of. By W. Doberck. I., 208. 
XxX, VARIABLE STARS, 
Nova Cygni, Spectroscopic and other Observations of Schmidt, made 
at Dun Echt Observatory (Ralph Copeland and J. G. Lohse), II., 
101. 
Variable Star, A New (Editors). I., 238, and II., 157. The staris D. M, 
+ 1°, 3408. 
XXI, STELLAR PARALLAX. 
Researches on the Annual Parallax of the Star Groombridge, 1618. By 
Prof. Robert 8. Ball, LL.D., F.R.S., Royal Astronomer of Ireland. 
LPG oil ; 
Determination of the Annual Parallax of 6 Cygni B= 2486. By 
Robert S. Ball, LL.D., F.R.S., Astronomer Royal for Ireland. 
If., 159: 
On the Parallax of the Star Bradley, 3077. By O. Backlund. II., 201. A 
discussion of an incomplete series of differences of Right Ascension 
observed by Wagner at Pulcova with the transit instrument. 
XXII, STELLAR SPECTROSCOPY. 
Remarkable Star Spectrum. Edward C. Pickering. I., 242. 
XXIII. MISCELLANEOUS SUBJECTS. 
An Account of some recent Astronomical Experiments at high eleva- 
tions in the Andes, By Ralph Copeland, Ph.D. III, 193. 
Corrections. I., 242; II., 244. 
Extracts from Two Letters from South America. Ralph Copeland. 
III., 66. 
Jottings on the Science of the Chinese, By Alexander Wylie. II., 169. 
Meeting of the ‘t Astronomische Gesellschaft” at Strassburg, September 
22-24, 1881, The. I., 200. 
Notes ona recent Visit to some North American Observatories. By 
Ralph Copeland. IIL, 133. 
On the Telegraphic Transmission of Astronomical Data. I., 179. 
U. S. Naval Observatory during the Year ending October 31, 1880, 
whe. 1, 48. 
REMARKS ON THY REDUCTION OF RUTHERFORD STAR PLATES. 
BY J. K. REES. 
(No Abstract.) 
Pror. Rees exhibited some of the negatives made by Mr. 
RUTHERFORD, and explained the operation of the apparatus for 
making the measurements. 
