Photometric investigation of X Arietis.

Based upon 475 photographic and photovisual observations obtained by the author between 1957 - 1986, as well as published data by other authors, an analysis was made of the behaviour of the mean fundamental pulsation period of X Ari. A O-C diagram is shown where the long time periodicity (Π = 4000^d) with an amplitude of 0^d04 is seen.