Dislocations and their role in strengthening / C.M. James -- Strain hardening / Earl R. Parker -- Solid-solution hardening / Robert L. Fleischer -- Precipitation hardening / Morris E. Fine -- Dispersed phase strengthening / Nicholas J. Grant -- Diffusionless (martensitic) transformations to strengthen metals / Eugene S. Macklin -- Strengthening by super lattice formation / Paul A. Flinn.