Contents: Electrochemical Corrosion and Reduction -- <i>Marcel Pourbaix, CEBEL-COR, Bruxelles, Belgium. Corrosion Product Characterization -- <i>N.A. Nielsen, E. I. duPont de Nemours & Co., Inc., Wilmington, Delaware Principles of Gaseous Reduction of Corrosion Products -- <i>C. Ernest Birchenall, University of Delaware, Newark, Delaware and Russell A. Meussner, Naval Research Laboratory, Washington, D.C. (See 15-1640.) Some Brief Remarks on Electrochemical Reduction -- <i>Jerome Kruger, National Bureau of Standards, Washington, D. C. Measures for Preventing Corrosion of Metals -- <i>R. T. Foley, Department of Chemistry, the American University, Washington, D.C. (See 15-1667. ) A Review of the History and Practice of Patination -- <i>Phoebe Dent Weil, Center for Archaeometry, Washington University, St. Louis, Missouri (See 15-1739.) The Production of Artificial Patination on Copper -- <i>D.C. Hemming, Revere Copper and Brass, Inc., Rome, New York Beta Iron Oxide Hydroxide Formation in Localized Active Corrosion of Iron Artifacts -- <i>F. Zucchi, G. Morigi, and V. Bertolasi, University of Ferrara, Ferrara, Italy The Current Status of the Treatment of Corroded Metal Artifacts -- <i>R. M. Organ, The Smithsonian Institution, Washington, D.C. (See 15-1708.) Some Constructive Corrodings -- <i>Cyril Stanley Smith, Massachusetts Institute of Technology, Cambridge, Massachusetts (See 15-1728.) Conservation of Rusty Iron Objects by Hydrogen Reduction -- L. <i>Barkman, Wasavaret, National Maritime Museum, Stockholm, Sweden Restoration of Large Gilded Statues Using Various Electrochemical and Metallurgical Techniques -- <i>Fielding Ogburn, Elio Passaglia, Harry C. Burnett, Jerome Kruger, and Marian L. Picklesimer, National Bureau of Standards, Washington, D. C. Problems of Retrieval and Retention of Artiflicts in Field Excavations -- <i>W. Trousdale, The Smithsonian Institution, Washington, D.C. Discussion on Structured Questions.