40 



ART. 10. — N. ICIITNOIIE : 



TABLE IX. 



10 Algols have longer periods than 10 days. 



In the above table, five stars are omitted because tlieir exact 

 period is yet unknown. In the accompanying figure, the upper 

 curve represents the table graphically. 



Fig. II. 

 Distribution of Periods. 



20 



10 



10 



If we speak of the 88 Algols, Algol-type variables have a 

 period from a half day to four full days in 55 cases ; from four 



