to underline the difference between diffuse layer and diffusion layer which so often confuses the beginner. Fick’s law is described but not so named. Another bad point is the treatment of resistance overvoltage, and the author lumps together two completely different phenomena under this one heading, the true one being a genuine over-voltage caused by a film of poorly conductive material, and the cuckoo in the nest here being the “ohmic drop error” which is a pure artefact of our measurement techniques and has no fundamental importance at all, and will vary according to the particular details of the experimental set-up. The author falls down, one feels, in this section on decomposition potentials. These are, as he says in one place, of little theoretical significance - but then he goes .on to calculate a value. This section was best omitted and the plotting of an 1 vs. E graph, with a linear extrapolation to an %comp value is thoroughly reprehensible at a time when one is still trying to era&cate this idea prevalent in the older textbooks written by authors who did not understand what was taking place. Table 8.1. is nonsense. To what current densities are these 71values supposed to refer? If the author had stressed the concepts of i, or k as electrochemical rate constant a few pages previously, he would have been able to use these meaningfully in such a table. In his treatment, “some theories of hydrogen overvoltage”, he omits any mention of the diffusion of gas from the surface, which is now accepted as being the r.d.s. for this process on the noble metals. There follows a good treatment of DC polarography and then the foundations are laid for an understanding of corrosion. Ten pages from the end of the book the author - or so it seems - appears to remember that his title includes “applications” and so we run through corrosion, fuel cells, primary and secondary batteries with a coverage that bears so much in common with generations of previous books, that it adds little to the value of this volume. With one final query as to whether the name “Henderson-Hasselbalch” is correctly spelled, one welcomes at least large parts of this book to the educational market. For, while in its first half it treats “ionics” no worse than half a dozen other such books, the kinetic treatment is a definite advance over most of the cheaper books already on the market. A. T. K. Organic Spectroscopy; Principles and Applications, by Pierre Laszlo and Peter Stang, Harper and Row, New York, 1971, pp. xii + 275, price $6.70.
This compact book provides a logical approach to spectroscopy and its applications to modem organic chemistry. The first section is made up of five chapters dealing with basic principles and properties of spectroscopy from ESR, NQR and microwave to the more usually discussed IR, UV and Raman spectroscopy.
The second section comprising six chapters considers the derivation of molecular parameters from spectra. The final section of six chapters deals with the deduction of organic structures from spectra. As well as references, a useful list of books and papers relevant to the subject matter of that chapter is given at the end of the chapter. Appropriate problems are given in all but one chapter and a senior undergraduate or graduate should, after careful study of the chapter and supplementary material, be able to answer the problems satisfactorily, even without recourse to the answers at the back of the book! The final chapter deals with applications of spectroscopic techniques to biomolecules and demonstrates quite succinctly how information learnt from earlier chapters can be applied to the study of real molecules with a variety of interacting structural elements. The book is completed by an index of authors cited in the various references quoted in each chapter, and a subject index. Senior undergraduates and research workers should find this book very interesting in its unified approach to so many spectroscopic techniques as applied to organic chemistry. The problems given are varied and the references adequate, altogether this book is recommended as good value for money. M. R.