1891.] ~ NEW YORK ACADEMY OF SCIENCES. 101 
Venus, Transit of, Observation of the, 1882, December 6, at Markree 
Observatory. By W. Doberck. III., 19. 
—Ibid., The Government Expedition to Madagascar to observe the, 
on December 6, 1882. By the Rev. S. J. Perry, F.R.S._ III., 67. 
—lIbid., Observation of the, December 6, 1882, at the Observa- 
tory of Queen’s College, Cork. By Prof. J. England. IIL, 75. 
——Ibid., Observation of the, 1882, December 6, at Dun Echt Ob- 
servatory. By J.G. Lohse. III., 129. 
XIII. MARS. 
Mars in 1881-82, Note on the Aspect of. By C. E. Burton. II., 91. 
XIV. JUPITER. 
Jupiters, Beitrag zur Kenntniss der Rotationselemente. Von Dr. H. 
Kobold. I., 123. 
XV. NEPTUNE. 
Neptune, Historical Note concerning the Discovery of. J. L. E. Dreyer. 
II., 63. Dr. Dreyer shows that d’Arrest as well as Galle took part 
in the observations that finally resulted in the discovery of Nep- 
tune. 
Neptune, Ueber die erste Auffindung des Planeten. J. G. Galle. II., 96. 
XVI. MINOR PLANETS. 
Kleiner Planeten, Beobachtungen, am Reichenbach’schen Meridian- 
kreise zu GOttingen (Dr. H. Kobold). I., 94. Observations during 
1880 of Nos. 3, 4, 5, 6, 7, 11, 14, 15, 20, 40, 43, 51, 78, 119. 
Prize Question of the Royal Danish Society of Science. III.,51. The 
Society here offers a gold medal ‘‘for a statistical investigation of 
the orbits of the Minor Planets, considered as parts of a ring around 
the sun.” 
XVII. NEBULZ. 
Merope, Note on the Nebula near. By J. L. E. Dreyer. I., 156. 
Nebule, New. By A. Ainslie Common. I., 50. 
Orion, Photograph of the Nebula in (Editors). I., 160. Notice of the 
photograph of this object taken by Prof. Henry Draper on March 
11th, 1881. 
Orion, The Spectrum of the Nebula in, photographed (Editors). II., 68. 
noe of Dr. Huggins’ photograph of the spectrum taken on March 
7th, 1881. 
Planetary Nebula, A New. By Ralph Copeland, Ph.D. I., 2. 
Planetary Nebula, New, Edward C. Pickering. I., 242. 
Positions of Nebule, Series I. By C. H. F. Peters. I., 51. 
—lIbid., Series II. By C. H. F. Peters. I1., 54. 
XVIII, DOUBLE STARS. 
Double Stars, Recent Measures of. By C. E. Burton. L., 54. 
Double Stars. On some Interpolation Formule for. By Prof. T. N. 
Thiele. II., 25. A very complete discussion of the most advanta- 
geous formule for the computation of double star orbits, under 
varying conditions as regards the data to be used. Contains also a 
set of auxiliary tables. 
