PROGRESS OF ASTRONOMY FOR 1891 AND 1892. 685 



the reductions liave also been made. The riglit ascensions were 

 observed chiono<jiriiphically over eleven vertical Avires, and the declina- 

 tions also chronographically over an inclined wire, the circle being 

 read by two microscopes. The probable error of an observation in 

 1870-'78 is ±0.8054: in right ascension and ±0".~)ii in declination, and is 

 rather greater for stars fainter than the eighth magnitude than for 

 brighter stars. 



The fifth volume of the Annals of the Leyden observatory contains 

 thesecondhalfof the zone observations between 4-30° and -f.'^oo — em- 

 bracing ten thousand observations. 



The Faris Catalogue. — The second part of this work, containing the 

 places of stars from 6^^ to 12'' of right ascension, has recently been 

 issued, the first part having been iiublished in 1887. There are really 

 three catalogues, the first comprising observations from 1837 to 1853 

 reduced to 1845.0; the second, those made from 1854 to 1867 reduced to 

 1860.0, and the third from 1868 to 1881 reduced to 1875.0. The stars 

 are arranged in the order of right ascension at 1875.0. A valuable 

 memoir on the proper motions of the stars contained in the catalogue 

 has been prepared by Bossert. 



Second Munieh CatalogKC. — A second catalogue, containing 13,200 

 stars for the epoch 1880.0 has been published under the direction of 

 Prof. Seeliger supplementary to the larger catalogue recently issued. 

 The stars are from the seventh to tenth magnitude within 25° of the 

 equator, and were observed with the meridian circle during the years 

 1884 to 1888. The positions depend upon Auwers's Fundamental Cata- 

 logue. 



Pulkoica Catalof/ue. — The Pulkowa catalogue of 5,634 stars for 1875 

 is deduced from observations made with the meridian circle during the 

 years 1874-'80, and prepared for imblication by Herr Komberg. The 

 stars are of various classes, including many of the Struve double stars. 

 A comparison is made with the places of several other catalogues. 



Oeltzen's Catalogue. — A new editon of Oeltzen's catalogue of Argel- 

 ander's southern zones, — 15° to — 31°, has been published by Prof. 

 Weiss. Tlie total number of stars is 18,276, the positions being given 

 for 1850.0 with the amount of the precession necessary to bring them 

 to 1875.0. The places of stars north of —23° have been comi)ared with 

 Schonfeld's Southern Dnrchmusterung, and south of that limit with 

 other catalogues, thereby eliminating a considerable numb<'r of errors 

 fronj the original ])laces. 



Ba;(1dic]cer\s map of the Milhy ^Vay. — Dr. Bteddicker, of the Karl of 

 Rosse's observatory at Birr Castle, has been at work since 1884 upon 

 an elaborate map of the Milky Way from the North Pole to 10° south 

 declination, an<l has at lengtli finished this very laborious task. His 

 plan has been to exhibit the ramifications of the ]Milky Way as it ap- 

 pears to the naked eye, a necessary first step to the knowledge of the 

 structure of the sidereal universe. No optical help has been used. 



