Anodic treatment of aluminum, by J. D. Edwards.- The passivation and coloring of stainless steel, by G. C. Kiefer.- The surface treatment of magnesium alloys, by H. W. Schmidt, W. H. Gross and H. K. DeLong.- Corrosion resistance of tin plate-influence of steel base composition on service life of tin plate containers, by R. R. Hartwell.- Zinc coatings-unit operations, costs and properties, by J. L. Bray and F. R. Morral.- Diffusion coatings on metals, by F. N. Rhines.- Surface reactions and diffusion, by J. E. Dorn, J. T. Gier, and others.- Heat treating with induction and hardening, by M. A. Tran and H. B. Osborn, jr.- Flame pretreatment of structural steel surfaces for painting, by J. G. Magrath.- Shot blasting and its effect on fatigue life, by F. P. Zimmerli.- Effect of surface conditions on fatiue properties, by O. J. Horger and H. R. Neifert.- Chip formation, friction and high quality machined surfaces, by Hans Ernst and M. E. Merchant.- Observations on the tarnishing of stainless steels on heating in vacuo, by V. C. F. Holm.- The tracer method of measuring surface irregularities, by E. J. Abbott.