I 



J. STEIN S. J. "3 Lyrae as a double star." 



^ZÏ-ZO -15-} 0-0.5 00 5 10 15 Z_0 15 30 35 4g e, 5 5.0 55 60 6.5 10 7.5 80 8.5 9.0 9.5 10.0 105 110 11.5 1Z.0 IZ.5 13 



The abcissae represent the time expressed in days; the 

 ordinates the light-intensity in grades. 



-Z5~k. 0-1.5 -1.0-0 5 0.0 05 l.C 15 Z.O U .3.0 3.5 ',0 1,5 5.0 55 bO 6.5 10 7.5 6.0 >i.b 9.0 9-5 10M 10.5 U.O 11.5 IZ.O 1Z.5 13.0 



Proceedings Royal Acad. Amsterdam. Vol. X. 



