346 



PROCEEDINGS OF THE AMERIC.VN ACADEMY 



CATALOGUE OF MEAN EIGHT ASCENSIONS. — Continued. 



III forming this catalogue the stars fiom the Berlin Jahrbuch were 

 reduced to the fraction of the year here given by the proper motion 

 from ''Publication XIV. der Astronomischeu Gesellschaft." For one 

 star, X Draconis, the true fraction .74 would have made a difference of 

 some thousandths in the result. 



For certain .«tars taken from the American Epliomeris, or its sup- 

 plements, a simihir course was followed. Those taken from the " Con- 

 naissance des Temps" were additionally corrected for omitted terms of 

 some trifling importance in the nutation. They are, — 



— 0.00295 sin (O + 82°.2) a 

 -\- 0^009 cos (O -)- 280°.9) b 



— E 



The first term, the only one at all .sensible, is tabulated in the An- 

 nals of the Harvard College Observatory, Vol, IV., part 2, page xi.x. 



The supposed aimual proper motions thus eliminated for the stars 

 of the American and French ephemerides are as follows ; — 



