THE first edition of Dr. Ulick R. Evans's “Metallic Corrosion, Passivity and Protection” appeared in 1937 and was reprinted in 1938, but has for some years been out of print. The second edition will be welcomed enthusiastically by all those interested in and concerned with, the corrosion of metals. .While the war years probably did not yield such a flow of new knowledge and information on corrosion as those just before the War, substantial advances have been made between 1938 and the present time. The author has striven effectively to avoid undue lengthening of the text in spite of his finding it desirable to refer to the work of some thousand additional contributors to knowledge on corrosion beyond those mentioned in the first edition. The new volume seems, in spite of some expansion of the text, to be of a very convenient and easily handled size. An important addition is an appendix on optical methods for the determination of films on metals by A. B. Winter -bottom, who has made a special study of this subject. Metallic Corrosion, Passivity and Protection By Dr. Ulick R. Evans. Second Edition, with an Appendix by A. B. Winterbottom. Pp. xxxiv + 863. (London: Edward Arnold and Co., 1946.) 50s. net.