COMMISSION 27 OF THE I. A. U. INFORMATION BULLETIN ON VARIABLE STARS NUMBER 78 Konkoly Observatory Budapest 9 January 1965 NOTE ABOUT THE PERIODS OF THREE VARIABLE STARS Among a number of Cepheids which the author has observed photoelectrically at the McDonald Observatory, USA, in July 1963, there are three variables which appeared to be RR Lyrae stars. These three stars are: V 414 Oph, V 558 Oph and EN Lyr. In the following table the new provisional periods are given together with the old periods and their references. Name New Old period period Reference V 414 Oph .431284d 3.16590d C. Hoffmeister, KVBB No 19, 1938 V 558 Oph .425884 2.89522 C. Hoffmeister, KVBB No 28, 1943 EN Lyr .70283 2.36456 M. Zverev, V. S. 5, 107, 1936 In all the three cases the new and old periods differ one or two units in their reciprocals. Sterrewacht, Leiden, Netherlands 4 January 1965 K. K. KWEE