The atomic magnetic susceptibility of Mn dissolved in Cu, Ag and Au has been determined in the approximate range 10-300°K for α-phase polycrystalline alloys with solute concentrations ranging from 19-284 atomic ppm. The results can be well described by a Curie-Weiss law from which the mean values of the effective Bohr magneton values are 4.93± 0.25, 4.73± 0.26 and 5.38± 0.27 for Mn in Cu, Ag and Au respectively, and the mean values of the paramagnetic Curie temperature are respectively -14°, 0° and -7°K. The data have been fitted to an expression by Scalapino for the solute susceptibility from which have been obtained estimates of the Kondo temperature. © 1969.