OP ARTS AND SCIENCES. 



305 



TABLE I. — Continufd. 



The first column of the left-hand page of Tahle I. gives a provis- 

 ional number for designating the star. This number is taken from 

 Schonfeld's Catalogue when the star occurs there ; in other cases, a 

 letter is added to the number. Other letters may be employed in 

 effecting additional interpolations. The second column contains num- 

 bers from the catalogue of stars observed with the meridian photom- 

 eter at the Harvard College Observatory, to be printed in Volume 

 XIV. of the Annals of that institution. The letters H. P. (Harvard 

 Photometry), prefixed to a number, will denote a reference to this 

 catalogue. The following columns contain the right ascension and 

 declination of the star for 1875, its magnitude at maximum and min- 

 imum, and its period in days. 



The first column of the right-hand page repeats the number to be 

 used for the provisional designation of the star. The second gives 

 the class to which the star belongs, upon the system of classification 

 employed in the Proceedings of the American Academy of Arts 

 and Sciences, XVI. 257. Upon this system, Class I. includes tem- 



VOL. XIX. (N. S. XI.) 



20 



