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unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 134.129.115.40 Downloaded on 2014-06-26 to IP ) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 134.129.115.40 Downloaded on 2014-06-26 to IP ) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 134.129.115.40 Downloaded on 2014-06-26 to IP ) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 134.129.115.40 Downloaded on 2014-06-26 to IP ) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 134.129.115.40 Downloaded on 2014-06-26 to IP ) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 134.129.115.40 Downloaded on 2014-06-26 to IP

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1231after, in various chapters, cotton receives detailed consideration as regards surface potential phenomena, the recognition and measurement of damage, and mercerixation. No less exhaustive is the treatment given t o the animal fibers: after discussing the behavior of wool and silk as amphoteric colloids, separate chapters are devoted to an examination of the influence of disulfide bond reactivity on the properties and processing of ~o o l and to the scientific aspects of felting and milling. With the preceding information as basis, the colloid chemistry of dyes and dyeing processes and the behavior of dyes on the fiber are discussed in three excellent chapters, in which the author makes use of his specialized knowledge. Finally, there are three chapters devoted to the colloid chemistry of soaps, detergents, wetting agents, and sizing materials.The book is beautifully produced, is well illustrated, and has an excellent bibliography a t the end of each chapter. Dr. Talk6 is to be congratulated on this important contribution t o the advancement of the science of textile materials and processes. J. B. SPEAKMAS.Principles oj" Chemical Engineering.

A quantitative relation between the cathode potential rise with the addition of inhibitor and its inhibition efficiency is suggested and proved. The difference in functions between nitrogen-containing organic inhibitors and cathodic inorganic inhibitors is pointed out.