Energy distribution curves of secondary electrons from a thoroughly outgassed molybdenum target have been obtained by magnetic analysis with primary electron energies up to 150 volts. In addition to the usual sharp peak and the broad, low energy maximum, other maxima and irregularities appear which may be classified as follows: (1) peaks at energies 10.6, 22 and 48 volts less than the primary energy which are due to energy losses among the inelastically scattered electrons; (2) humps in the curves at secondary energies of 11, 24 and 35 volts, independent of the primary energy. The number of elastically reflected electrons is plotted as a function of primary energy. This curve exhibits several maxima, some of which are correlated with the critical potentials giving rise to the peaks of type (1). Others are due to electron diffraction. A discussion of possible applications of modern metallic theories to the present results is given. Two of the peaks of type (1) and all of those of type (2) are tentatively accounted for.