1891.] NEW YORK ACADEMY OF SCIENCES. 89 



Bredechin, Th. — Recherches sur la Comete de 1882 II. III., 81. 



Note sur la Queue du Premier Type de la Comete 1882 II. III., 



117. 

 Quelques Mots sur les Cometes; Reponse a M. Schwedoflf. II., 



121. 

 Burton, C. E.— Recent Measures of Double Stars. I., 54. 



[Review of Schiaparelli's paper, " Osservazioni astronomiche del 



pianeta Marte." I., 239.] 

 Note on the Aspect of Mars in 1881-1882. II., 91. 



Common, A. A. — New Nebulae. I., 50. 



COPELAND, Ralph. — A New Planetary Nebula. I., 2. 



Observations of the Spectrum of Comet 1880 f (Pechiile) at Dun 



Echt. I., 40. 



Elements of Comet a 1881. I., 120. 



The Comet of 1733. I., 164. 



Extracts from Two Letters from South America. III., 66. 



Notes on a recent Visit to some North American Observatories. 



III., 133. 



An Account of some recent Astronomical Experiments at high 



elevations in the Andes III., 193. 



The Late Prof. Klinkerfues (a Biographical and Obituary Notice). 



III., 239. 



and LOHSE. — Observations of the Spectrum of Comet 1880 d (Hart- 

 wig). I., 1. 



Observations of Comets made at Dun Echt Observatory. I., 4. 



Observations of Comet a 1881 (Swift). I., 122. 



Observations of Comets c and e 1881. I., 236. 



Observations of Comets 1881 6, /, and g. II., 42. 



Spectroscopic and other Observations of Schmidt's Nova Cygni 



made at Dun Echt Observatory. II., 101. 

 -Spectroscopic Observations of Comets III. and IV. 1881, Comet 



I. 1882, and the Great Comet of 1882. II., 225. 

 — Observations of Brooks' Comet (Comet of 1812). III., 131. 



Denning, W. F.— Meteor Streams. I., 194. 



DOBERCK, W. — On X Virginis considered as a Revolving Double Star. 

 I., 143. 



Markree Observations of Red Stars. I., 208. 



The Transit of Venus observed at Markree Observatory. III., 19. 



Dreyer, J. L. E. — Comparison Stars. A Suggestion to Astronomers. 

 I., 49. 



The Instruments in the Old Observatory at Peking. I., 134. 



Note on the Nebula near Merope. I., 156. 



Meridian Observations of Comet h 1881. I., 163. 



Meridian Observations of Comet c 1881 (Schaeberle). I., 181. 



Historical Note concerning the Discovery of Neptune. II., 03. 



[Notes on Wagner's paper " Ueber ein altes Manuscript der Pul- 



kowaer Sternwarte." See Wagner.] II., 129. 



A New Determination of the Constant of Precession. II., 135. 



-Observation of the Transit of Venus, 1882, December 6, at the 



Armagh Observatory. III., 18 

 — Note on the Accuracy of Lalande's Right Ascensions. III., 103. 

 — On the Multiple Tail of the Great Comet of 1744. III., 104. 

 — Further Note on the Comet of 1744. III., 184. 



