A Catalogue of 130 Polar Stars for Ihe Epoch of 1875.0, remltbuj from all the availuUe 

 Observations made hetiveen 1860 and ISSo, and reduced to the S/jstem of the Catalogue 

 of Publication XIV. of the Astronomische Gescllschaft. 



By WILLIAM A. ROGERS a>'d ANNA WINLOCK. 



Presented June 16, 1886. 



FIRST PAPER. 



Note by WrLLiASi A. Rogers. — My connection with this work is limited to the methods of 

 discussion adopted, and to an examination of the nuniericnl results obtained. Beyond tliis, all tlie 

 work in the preparation of this paper has been done by my assistant, Miss Winlock, and she is 

 entitled to all the credit therefor. 



It is the purpose of the present paper to discuss the modern observations of 

 such polar stars north of +70' declination as are found in the Harvard College 

 Catalogue of 1213 Stars. Of the 130 stars in this list, 68 are found in the Funda- 

 mental Catalogue of Dr, Auwers. 



There will be no attempt to determine the proper motions of these stars, but 

 the places determined for the epoch 1875.0 will serve a useful purpose in future 

 discussions of this element. The provisional values of /x and /x,' employed in the 

 reductions are those given in the Harvard College Catalogue. 



All the observations employed in this discussion will be reduced to the System 

 of Publication XIV. of the Astronomische Gesellschaft, either directly through the 

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

 systems, or indirectly through the medium of the Harvard College Catalogue. 



For many reasons, it was found advisable to construct a 3'early ephemeris of 

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

 mental stars of the list, the places for 1880 and for sub.sequent years were taken 

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



