100 TRANSACTIONS OF THE [mAR. 2, 



A Determination of the Semi-Diameter of the Moon from two occulta- 

 tions of the Pleiades observed on Jul}- 6, 1877, and September 

 6, 1879. By H. M. Paul (Wash. Obs., 1879, App. II.). 



Annual Report of the Board of Regents of the Smithsonian Institution 

 for the Year 1881 (Washington, 1883). 



On the Influence of Magnetism on the Rate of a Chronometer. By O. 

 Boeddicker (Trans. R. Dublin Soc. Vol. III.). 



III., 243. 



Report on the Solar Eclipse of July, 1878. By Cleveland Abbe. (Prof 

 Papers of the Signal Service, No. 1, Washington, 1881). 



IX. ASTRONOMICAL BIOGRAPHY. 



Bruhns, Carl Christian. Obituary Notice (Editors). I., 165. 

 Klinlierfues, The late Professor. Ralph Copeland. III., 239. 

 Robinson, Thomas Romney. Obituary Notice (Editors). II., 64. 

 Powalky, Carl Rudolf. Obituary Notice (Editors). L, 165, 



X. THE SUN. 



Chromosphere, The, in 1880. By the Rev. S. J. Perry. I., '97. 



in 1881. By S. J. P. II., 62. 



in 1882. By S. J. P. III., 102. 



in 1883. By S. J. P. III., 232. 



Parallax, On the Solar, as derived from the American Photographs of 

 the Transit of Venus. 1874, December 8-9. By D. P. Todd, M. A. I., 

 167. From a preliminary discussion of the equations formed 

 from the measures of the photographic plates, the author finds a 

 value of TT = 8. "883. 



Tables ecliptiques, Supplement aux, de P. A. Hansen. Par H. C. F. C. 

 Schjellerup. I., 155. The tables to which these are an addendum 

 are publislied in Berichte der K. Sach. Gesell. der Wissenschaf- 

 ten, IX. (1857), pp. 75-112. 



Sonnenfinsterniss, Beobaclitung der partiellen, zu O'Gyalla, 1882, 

 Mai 16. (Dr. H. Kobold). III., 76. 



Sonnenflecken, Beobachtungen von, am Astrophysicalischen Observa- 

 torium zu O'Gyalla (Dr. H. Kobold). II., 89, 131, and 196. 



XI. THE MOON. 



Hiilfstafeln zur Erieichterung der Berechnung von Sternbedeckungen 

 durch den Mond. Von Dr. C. Borgen. I., 8. Errata in certain of 

 the forranlaj contained in this paper are found in I., 49. 



Lunar Radiant Heat, Determinations of the, during the Progress of an 

 Eclipse. By the Earl of Rosse. I., 22. 



Xn. VENUS. 



Venus, Satellite of. On some hitherto Unknown Observations of a Sup- 

 posed. By H. C. F. C. Schjellerup. II., 164. The observations re- 

 ferred to are seven made by Roedkiaer in 1761, and one made by 

 Horrebow in 1768, at the Copenhagen Observatory. 



Venus, Transit of, Observation of the; 1882, December 6, at the Armagli 

 Observatory. By J. L. E. Dreyer. III., 18. 



