

V. 



A Catalogue of ISO Polar Stars for the Epoch of 18750, resulting from all the available 



Observations made between 1860 and 1885, and reduced to the System of the Catalogue 



of Publication XIV. of the Ast 



Gesellschaft 



By WILLIAM A. ROGERS and ANNA WINLOCK. 



Presented June W, 1886. 



FIRST PAPER. 



Note by "William A. Rogers. 



My connection with this work is limited to the methods of 



discussion adopted, and to an examination of the numerical results obtained. Beyond this, all the 

 Avork in the preparation of this paper has been done by my assistant, Miss AVinlock, and she i 

 entitled to all the credit therefor. 



It is the purpose of th 



pi 



paper 



to di 



the modern observations of 



such polar stars north of +70° declination as are found 



Catalogue of 1213 Stars 



Of the 130 stars 



in the Harvard College 

 G8 are found in the Funda 



mental Catalogue of Dr. Auwers. 

 There will be no attempt to dete 



the 



oper motions of 



but 



the pi 



determined for the epoch 1875.0 



discussions of this element. 



The 



pi 



ve a useful purpose in future 

 of u, and u employed in the 



reductions are those given in the Harvard College Catalo 



o 



All the obsei 



d 



this disc 



be reduced 

 »ither direc 



the 



of Publication XIV. of the Astronomische Gesellschaft, either 



medium of the fundamental stars common to the observed and the fund; 



systems, or indirectly through the medium of the Harvard College Catalog 



tern 

 the 



For 



many 



it was found advisable to construct a 



rly epheme 



of 



each of the stars in the proposed list, extending from 1860 to 1885. For the funda- 



places for 1880 and for subsequent years were taken 



mental stars of 



the 



directly either from the catalogues of the Astronomische Gesellschaft or from the 



Mo. Bot. G*Hap 



