In this paper we present the results of our study of period change in 547 Mira variables using data from the AAVSO (American Association of Variable Star Observers). We use wavelet analysis to measure the period changes in individual Mira stars over the span of available data. By making linear fits to the period versus time measurements, we determine the average rates of period change, d(lnP)/dt, for each of these stars.

Cone search capability for table J/AJ/130/776/table1 (Measured periods and rates of period change for 57 Mira stars with d(lnP)/dt greater than 2{sigma} above the measurement error)