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Standard X-Ray Diffraction Powder Patterns. Howard E. Swanson, Nancy T. Gilfrich, Marlene I. Cook, Roger P. Stinchfield, and Paul C. Parks. 76 pages. National Bureau of Standards Circular 539, Volume 8. 1959. 45 cents.
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This publication, the eighth in a series of the same title, presents 61 patterns, 33 of which are replacements for 39 patterns already represented in the bureau's X-Ray Pattern Data File, and 28 are for compounds not previ ously represented. Each section con tains structural data, lattice constants, calculated densities, and a table com paring indexed d values and intensities presented by NBS with existing pow der patterns available in the literature. Odor
Measurement
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Proceedings of the Third Annual Symposium on Problems in Air Pol lution held at The Franklin Institute Oct. 21, 1958. 82 pages. The Frank lin Institute Laboratories for Re search and Development, Informa tion Services, 20th and Benjamin Franklin Parkway, Philadelphia 3, Pa. April 1959. $3. Transcripts of the introductory re marks and of seven papers presented at the symposium are given in this plastic-ring-bound book. Illustrations and references are given for each paper, and records of the discussions concern ing various papers are grouped to gether at the end of the book. Modern Aspects of Electrochemistry,
No. 2. J. O'M. Bockris. ix + 416. Academic Press, Inc., I l l Fifth Ave., N e w Y o r k 3 , N . Y . 1959. $13.
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ANALYTICAL CHEMISTRY
In this book, the choice of subjects to be considered was made on the as sumption that electrochemistry, at least in the Anglo-American literature, is that branch of physical chemistry con cerned with the properties of electro lytes and electrified interfaces. The first chapter deals with the field of interionic attraction in solution. Ion ex change, a field of large practical sig nificance, has a largely electrochemical basis, and its outlines are presented in Chapter IL Chapter III reviews the results of the considerable research effort in the subject of molten electro lytes. Chapter IV contains a discussion of the mechanism of anodic processes at electrodes. And in Chapter V a new branch of electrochemistry, that con cerning the semiconductor-solution in terface, is presented. The book in-
