We consider in this paper the persymmetric determinantswherep(x) being a function which is not negative in the interval (a, b) (finite or infinite); we suppose further that the integralsexist fors= 0, 1, 2,….The object of this paper is the application of a theorem stated by the writer in the paper “Sur un déterminant de Hankel” to many determinants of the type (1), referred to by Sir Thomas Muir in his paper “The theory of persymmetric determinants from 1894 to 1919.”