102 TKANSACTIONS OF THE [mAR. 2, 



On y Virginis considered as a Revolving Double Star. By W. Doberck. 

 I., 143. 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 Oltservations of. By W. Doberck. I., 208. 



XX. VARIABLE STARS. 



Nova Cygni, Spectroscopic and other Observations of Schmidt's, made 

 at Dun Echt Observatory (Ralph Copeland and J. G. Lohse), II., 

 101. 



Variable Star, A Xew (Editors). I., 238, and II., 157. The star is D. M. 



+ 1% 3408. 



XXI. STELLAR PARALLAX. 



Researches on the Annual Parallax of the Star Groonibridge, 1618. By 

 Prof. Robert S. Ball, LL.D., F.R.S., Royal Astronomer of Ireland. 

 I.. 16. 



Determination of the Annual Parallax of 6 Cygni B =2 2486. By 

 Robert S. Ball, LL.D., F.R.S., Astronomer Royal for Ireland. 

 II., lo9. 



OntheParallaxof 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. Bv 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 " AstronomischeGesellschaft " ac Strassburg, September 

 22-24, 1881, The. I., 200. 



Notes on a recent Visit to some North American Observatories. By 

 Ralph Copeland. III., 133. 



On the Telegraphic Transmission of Astronomical Data. I., 179. 



U. S. Naval Observatory during the Year ending October 31, 1880, 

 The. I., 48. 



REMARKS OX THE REDUCTION OF RUTHERFORD STAR PLATES. 



BY J. K, REES. 



(No Abstract.) 

 Prof. Rees exhibited some of the negatives made by Mr. 

 EuTHERFORD, and explained the operation of the apparatus for 

 making the measurements. 



