Basinski and Butt and Feltham using single crystals based on copper, silver, magnesium and polycrystalline brasses found interesting relation between Critical Resolved Shear Stress (CRSS) and Activation Volume. In the present work similar correlations were obtained for monocrystalline cadmium zinc alloys in very wide temperature interval (1,5K to 380K). The results are shown to comply with a relatively simple theory of solid solution hardening which was developed further so as to account for the anomalous temperature dependence of the CRSS and of the Activation Area observed below , where TD is the Debye temperature of the alloy.