Book Reviews CONTINUOUS FLOW ANALYSIS: THEORY AND PRACTICE (CLINICAL AND BIOCHEMICAL ANALYSIS SERIES VOLUME 3) by William B. Burman, Marcel Dekker, Inc., New York 1976, 352 Pages. Price $24.50. This is a reference book for analytical chemists already familiar with the use of the Auto Analyzer for quality control and research applications. The author is Chief of the Methods Research Branch of the National Center for Drug Analysis of the Food and Drug Administration in St. Louis. In compiling the book, the author reviewed 3,000 papers in continuous flow analysis. The book contains 941 references to literature on this subject. Chapter 1 describes briefly the develop- ment of the Auto Analyzer and its ap- plication to analytical determinations with extensive reference to the literature. Chapter 2 deals with a description of the Auto Analyzer modules which have been developed and the problems associated with their use. Chapter 3 describes the use of other laboratory instruments in conjunction with the instrument, such as atomic absorption, spectrophotometers, Redox systems, flame photometers, gas chromatographs, etc. Chapter 4 deals with the selection and assembly of tubings and fittings for separation of immiscible liquids and the tubings used for various materials. Chapter 5 describes various uses of continuous flow manifolds with liquid column chromatographic systems having off and on line modes. Chapter 6 deals with the use of automatic data processing in conjunction with the instru- ment. Chapter 7 is written by Dr. W. H. C. Walker of McMaster University in Canada and discusses the theoretical aspects of a continuous flow system from the standpoint of factors influencing peak characteristics and practical steps that can be taken to improve peak quality and analytical performance.--ROBERT T. CONNER-- Consultant FILTRATION: PRINCIPLES AND PRACTICES (IN TWO PARTS), PART I. (Chemical Processing and Engineering Series, Volume 10) Edited by Clyde Orr 1977, Marcel Dekker, Inc., New York, 1977, 544 Pages, 700 References, 160 Figures, 26 Tables, 501 Equations, bound, Illustrated. Price $45.00.

JOURNAL OF THE SOCIETY OF COSMETIC CHEMISTS 713 This, the first part of a two volume edi- tion, focuses on a variety of filtration topics related in part to cosmetic process- ing of waste chemicals and maintenance of environmental air quality standards. Earlier chapters present a rigorous mathematical treatment of Gas and Liquid Filtration models. Medium, Depth, and Cake Liquid Filtration methods are sup- ported by discussions on various well- known filtration aids and pretreatment techniques. Filter media strength, stability, and chemical resistance are classified according to trapped particle size, permeability, solids holding capacity, and longterm media efficiencies. The review of industrial gas filtration techniques in Chapter 4 is particularly relevant to the treatment of airborne powders, pigments, and fumed cosmetic thickeners. Also pertinent in this and later chapters is the discussion of solid-liquid separation as a function of batch, semi- continuous, and continuous operations. Selection of most suitable equipment for filtration needs is aided by worked through problems and detailed schematics of familiar industrial equipment. A final chapter on Ultra filtration centers on the separation of 10 to 100 • particles and Tubular Membrane Configurations, Thin-Channel Membrane Modules, and Hollow Fiber Systems are shown. Application of Ultra Filtration to water purification is offered as an alterna- tive to other less feasible means. An excellent listing of filtration references is given after each chapter.- JAMES KINNEY--Clairol Inc. ANALYSIS OF ESSENTIAL OILS BY GAS CHROMATOGRAPHY AND MASS SPEC- TROMETRY, Vol. I, 1st Ed., Edited by Yoshiro Masada. John Wiley & Sons, Inc., New York, 1976, IX + 334 pages. Price $37.50. The book consists of two parts. The first part is the subject of this review. The second part (32 pages) printed only in Japanese, describes basic information on the components and methods for analysis of an essential oil as well as basic informa- tion concerning gas chromatography and mass spectrometry. Part I, contains the botanical descrip- tion, physical and chemical constants, gas chromatograms, mass spectrum, and recent bibliography for sixty-four essential oils. The Gas Chromatograms are supple- mented by peak identifications as well as instrumental conditions. The mass spec- trums of major components of the oils also have peak identifications. There are 156 figures. The book is a useful guide for anyone conducting research concerned with perfumes, flavors, and spices. It is a guide in that the representative samples of oil used for analysis do not represent, in all cases, the actual material of commerce available in the U.S.-- WINTHROP E. LANGE--The Purdue Frederick Company SURFACTANT SCIENCE SERIES, VOLUME 7: ANIONIC SURFACTANTS, PART I, Edited by Warner M. Linfield, Marcel Dekker, Inc., New York, 1976, XI + 314 Pages. Price $35.00. This two-part volume deals primarily with the organic chemistry of anionic surfactants, a class of surfactants which is probably the one of greatest importance from both an economic and a scientific perspective. The literature on this class of compounds is voluminous: consequently, each major type of anionic surfactant is covered in a separate chapter the lipid and petrochemical antecedents of these surfactants are each treated in a separate chapter also, there is a chapter on the