25b 



PROCEEDINGS OF THE AMERICAN ACaDEMY 



depend entirely ou the work of previous observers. Approximate 

 methods are depended upon throughout, where a rigorous computation 

 would have been employed, if the results were to be regarded as final. 

 In Table I. is given a list of all the known variable stars whose periods 

 are less than three mouths. The successive columns give a current 

 number, the number in Schonfeld's Secoud Catalogue,* the name of 

 the star, and the class to which it belongs, when this is known with 

 cert-aiuty. Then follow the right ascension and declination for 1880, 

 the period in days, and the inaguitudes at maximum and minimum. 

 The data for the southern stars which are not given by Schoufeld are 

 taken from the Uranometria Argentina. The last columns give the 

 name of the discoverer and the year in which the variability was 

 detected. 



TABLE I. — Variable Stars of Short Periods. 



* Zweiter Catalog von veriinderlicheii Sternen. Mannheim, lb75. 



