The Variations in the Period of the UZ Leo

The moments of 2 yellow light primary minima of the binary UZ Leo were measured in January, 1980,and in February, 1981,by means of the photoelectric photometric method. The moments when the primary minima reached of other authors are collected and the (O-C) graph of the variations in the period of the UZ Leo is also drawn. It is found that the orbital period of the binary suddenly increased in about 0.72 seconds before and after 1949 and in about 0.59 seconds before and after 1966. The epoch formulae during the different periods arc also given in the present paper.