106 



Vol. LXII. Part. II. Ledger of zone Observations made with the 8- 

 ijich Meridian Circle duriug the Years 1888-1898. By A. Searle. 1911. 



Vol. LXIV. No. VII. Observations with the Meridian Photometer 

 during the yeai-s 1907 aud 1908. i 



Volt. LX & VLXVI. Journal of Zones observad with the 8-inch Meri- 

 dian Circle during the yeai's 1888-1898 by A. Searle. 1910. 



Vol. LXVIII. l'art II. Observations and investigations made at the 

 Blue Hill Meteorological Observatory, Mass, in the yeara 1906-1908, un- 

 der the direction of A. L. Rotch. 1911. 



Vol. LXIX. Part I. Photometric Observations made with the 15-inch 

 Eaat Equatorial during the years 1892 to 1902 by O. C. Wendell. 1909. 



Vol. LXX. Durcbmusterung Zones observed with the 20-inch Meri- 

 dian Photometer by E. C. Pickering. 1909. 



Vol. LXXI. No. 1. Standard Photometric Magnitudes ofBright Stars. 

 By E. C. Pickering. — No. 2. Spectra and Photographic Magnitudes of 

 Stars in Standard Regions. By Williaraina P. Fleming. 



Circulars. 1910-1911. — 149. Group of Red Stars in the Conatellation 

 Sagittarius. — 150. A Standard Scale of Photographic Magnitudes. — 151. 

 20 New Variable Stars in Harvard Map No. 49. — ló^. 20 New Variable 

 Stars in Harvard Maps, Nos., 2, 5, 32, 44 & 53. — 153. Opposition of Eros 

 (433) in 1910. — 154. Determination of absoluto Wavelengths with objective 

 1 'risras. — 155. Accui'ate measlirement of photogi-aphs. — 156. Compari- 

 son Stars for Halley's Comet. — 157. Brightness of HaUey's Comet. — 

 158. Stars having peculiar spectra. 38 new variable stars. — 159. 15 new 

 variable stars in Harvard Map, Nos. 7, 10, 16, and 19. — 160. Photogra- 

 phic Magnitudes. Progress to July, 1910,. — 161. Curved photographic 

 plates. — 162. 22 new variable stars in Harvard Map, No. 52. — 163. 

 181325. Nova Sagittarii, No. 3. H. V. 3306.— 164. Nova Sagittarii, No. 4. 

 i ive new variable stars. — 165. Three new variable stars in Harvard Map, 

 No. 22. — 166. Cooperation in observing vaiiable stai-s. — 167. Stars having 

 peculiar spectra, 31 new variable stars. 



Mitteilungen der Nikolai-Hauptstemwarte zu Pulkowo. 4° 

 Taf. — O. Backlund, Director. 



Band III. 1909. No. 29. Etudes nouveUes sur l'application des filtres 

 sélecteurs a la recherche de l'absorption cosmique sélecti ve. Par G A. Ti- 

 khoff. Ipl. — Determination de la parallaxe de Aurigae par la méthode 

 photographique de M. Kapteyn. Par G. A. Tikhoff. — Observations de la 



