494 JOURNAL OF THE SOCIETY OF COSMETIC CHEMISTS AEROSOL SCIENCE. Editor: C. N. Davies. Pp. xviii q- 468 q- Ill. (1967). Academic Press, London, New York. 115s. $10.50. It must be stated at the outset that the average cosmetic chemist will not find in this book an easy, intelligible introduction to the science of aerosols that will help him to bridge the gap between the technology and the fundamental science. "Aerosol Science" makes few concessions to a popular or even technologically based approach. It is a thorough, well edited account of the present state of this branch of colloid science. The book was almost devoid of direct reference to the more familiar mani- festations and applications of the aerosol state, for example, fogs, smokes and atom- izers were not discussed in practical detail. Nevertheless, "Aerosol Science" is a very able compilation of up-to-date infor- mation, written by the leading practitioners of this subject. Physicists, colloid chemists and chemical engineers can derive considerable enlightenment from a study of the various chapters of this work. The first chapter of this book, dealing with the genera- tion of aerosols is worthy of study of those practising a variety of scientific and technical disciplines. Chapters V and VI, which deal in detail with the transport influences on aerosol particles, namely thermophoresis, diffusiophoresis and photo- phoresis will appeal to colloid chemists. An excellent chapter by R. G. Doorman on the filtration of aerosol particles would repay study by chemical engineers and others concerned in the processing and classification of powders. Chapter IX, on the adhesion to surfaces of particles is of general interest, if only because of the descriptions of elegant techniques [or the measurement of this property. These techniques, inciden- tally, owe much to Tabor and his school at Cambridge. To conclude, many industries which are more science-based than our own could derive immediate value from "Aerosol Science". Is it too much to hope that in the near future we may find available to us "An Introduction to Aerosol Science" in whose pages aerosol science and aerosol technology would be more strongly integrated? F. J. MOTTRAM. MODERN PRINCIPLES OF ORGANIC CHEMISTRY. J. L. Kice and E. N. Marvelt. Pp. ix q- 449 q- Ill. (1966). Collier- MacMillan, London. 70s. This claims to be the "first brief text" presenting a flexible mechanistic treat- ment of modern organic chemistry. Brevity it certainly' has: the authors cast a wide meshed net over a large proportion of the high seas of natural and synthetic organic substances, sufficiently superficially to require only 420 large-type pages there is also one final chapter encompassing the diagnostic importance of the spectral properties of molecules. An unusual feature of the presentation is the liberal use of brown type to emphasize key substituents or direct attention to particular reacting species or the nature of rearrangements. One must also praise the clarity of the structural formulae, wherein atoms other than carbon and hydrogen are set in heavy black type against the finely drawn hexagons, etc. There is also use of a paler brown background to set off, some- what luridly, important tables or reaction schemes. Each chapter carries its own crop of graded problems although the answers are left to the class tutor..

•ooK REWEWS 4.q5 The pattern of the book, admittedly reminiscent of the inestimable 'Cram & Hammond', is at first to introduce the necessary principles of nomenclature, structure and key reactions, before passing to the fundamentals of mesomerism, stereochemistry and structure correlation with reaction rate and equilibrium these 10 chapters provide a reasonable framework for developing a general analysis of organic reactions. In the remaining five chapters the preceding treatment is applied to various classes of relatively sophisticated natural and synthetic products: carbohydrates, peptides, heterocyclics, terpenes and steroids, and macromolecules (including synthetic polymers). These chapters frequently degenerate into tables of illustrative formulae of arguable paedogogic value but the examples chosen are in many cases undeniably topical. One welcomes a brief but readable account of the principles, as currently held, of the theory of acetate-mevalonoid biogenesis of isoprenoids. The ubiquity of contemporary deployment of spectrometric investigations has prompted a further chapter which briefly explains the absorption of electromagnetic radiation and then refers to frequencies for characteristic vibration (Jr) and electronic (uv) transitions • the treatment of the latter being restrictedto •-conjugated systems. There are three simple examples of diagnosis from ir spectra. Surprisingly the presen- tation of nmr spectrometry is rather less terse than for the more conventional tech- niques: chemical shifts and first order spin-spin coupling are briefly explained and exemplified. However, it is unfortunate that the chemical shifts are exclusively dis- cussed in terms of delta ppm, without even a reference to the alternative (a•id now preferred) use of tau (10 - delta) units. Mass spectrometry and its potential develop- ment are merely mentioned in two valedictory paragraphs- but then it is difficult to see what could have been given in a book of these limited dimensions and scope. The book should be judged as it is intended to be used, that is as a half-year introductory course for students who subsequently may proceed to a variety of life- science Honours courses. Given good tutorial support, orientated to the particular slant of the freshmen concerned, this text should provide a basic understanding of structural features and reaction driving forces, without overburdening memory with a welter of data in many cases unlikely ever to be retrieved. Honours chemistry schools would legitimately look elsewhere. G. F. PHILLIPS INFRARED SPECTRA OF ADSORBED SPECIES. L.H. Little. Pp. xii d- 428 d- Ill. (101313). Academic Press, London/New York. 100s. $16 Books on ir spectra are numerous but those devoted to adsorbed species are few and far between. A number of papers relating to this topic have been published and this book with its 700 odd references and supplementary chapters by A. V. Kiselev and V. I. Lygin is basically a review. The primary appeal will be for scientists interested in catalysis and for metallur- gists and geologists but the field covered in the book is very wide. There is extensive discussion of (a) the adsorption of gases and hydrocarbons onto metals and metal oxides, the mechanism of catalysis and differentiation between chemi- sorption and physical adsorption, and (b) surface hydroxyl groups and the general adsorption of molecules within clays and zeolites. There are other chapters covering early Russian work and studies of the pertur-