9.49. JOURNAL OF THE SOCIETY OF COSMETIC CHEMISTS CHEMICAL PROCa SS ECONOMICS, Vol. I, 2nd Ed., Edited by J. Happel and D. G. Jordan. Marcel Dekker, Inc., New York, 1975, 511 pages. Price $19.75. This is the first volume in a new international series of chemical pro- cessing and engineering textbooks. Volume I examines the economic factors that influence project analysis and plant design in detail. In Chapter I, in detail we are giv- en an introduction to the Chemical Industry. The effects of raw ma- terials, energy, and manpower re- quirements on chemical production, and research development expendi- tures are covered. The financial as- pects of the Chemical Industry, in- cluding the small to large com- panies, are discussed. Chapters II, III, and IV axe con- cerned with the principles of eco- nomic evaluation. The inclusion of basic economic concepts in Chapter II should be helpful to many engi- neers involved in cost estimation and project analysis. Rate of return, cash position, income taxes, investment position, net profits, cost of product, and pay-out time are just a few of the topics treated in this chapter. Each point is illustrated through the use of problems, which cover simp]e through complex situations. Chapter III gives a detailed dis- cussion of the various economic evaluation equations that are useful in preparing an economic evaluation. Chapter IV presents a discussion of the more advanced mathematical techniques used in the evaluation and analysis of project feasibility. Many of these advanced techniques are readily handled by computers, a point not adequately covered by the authors. Chapters V and VI provide infor- mation which enable the reader to apply the techniques previously dis- cussed. The difficult topic of cost es- timation is covered briefly the auth- ors leaving a detailed explanation of this to other texts in the field. The remaining two chapters are involved with project analysis and process plant components. Design of distillation columns, heat transfer ap- paratus, and piping are covered. All chapters are generously ref- erenced (146 references in all), and well illustrated with charts, dia- grams, and problems. This book should be included in the Chemical Engineers' library and should be of considerable value.--GERA• Ro•- Chesebrough-Pond's Inc. FRAGRANCE TECHNOLOGY--SYN- THETIC AND NATURAL PERFUMES, by Ronald W. James. Noyes Data Corporation, Park Ridge, New Jersey, 1975. 11 Introductory pages, 298 pages, 9 pages book advertising. Price $36.00. This book is a compilation of U.S. Patents since 1964 which relate to the manufacture of synthetic and natural perfumes and which are grouped according to odor type (i.e., woody, musk, floral), general pro- cesses, and product applications. This book encompasses a total of 246 patents. Each patent is sum- marized, and in most cases, pertinent cxamples axe quoted from the pat- ent. The summaries are, in general, well-prepared, and the examples are selected from the patents to cover the most important products or pro- cesses.

JOURNAL OF THE SOCIETY OF COSMETIC CHEMISTS 243 The author has selected a repre- sentative group of patents in the fragrance field. Consequently, the book should be especially useful to anyone who wants to inake a quick survey of the recent developments in the fragrance technology covered by patents. No comments are made on the industrial importance of the patents, nor are there any references to the scientific literature. The book is, therefore, only a compilation of selected patents with summaries of inventions and examples taken tom the specifications. A table of contents at the kont lists each patent and serves as a sub- ject index. This book is also indexed by company, inventor, and U.S. Patent number. This arrangement should facilitate the locating of a patent in the book. A similar voluine authored by M. Gutcho was published in 1970 by Noyes Data Corporation under the title, "Chemical Process Review No. 45, Synthetic Perfumery Materials." It is essentially the same in organi- zation and scope as the present vol- ume, but covers an earlier period (1951-1970). A number of patents are included in both volumes. The basis for selecting patents for either volume is not clear to this reader. It would seein that a small supplement would havc sufficed to update "Re- view No. 45," rather than this new volume.--NoRMaN L. GaE•--Givau - dan Corporation. THE PHYSIOLOGY AND PATHOPHYSI- OLOGY OF THE SKIN . Vol. III, Edited by A. Jarrett, Acadeinic Press, New York, 1975, Price $34.50. Voluine I of this series was on the epiderinis and Volume II was on the nerves and blood vessels. This series of books is aimed at bringing to- gether contemporary knowledge and thinking on normal and abnormal skin physiology in a form such that the practicing dermatologist, biolo- gist, and other scientists can relate it to some of the clinical problems each encounters. This volume concerns itself with the dermis and the dendritic cells of the epidermis. The first section, on the dermis, gives an account of the chemistry of collagen and elastic tissues. The physical nature of the dermis in the living skin is dis- cussed in some detail. Diseases af- fecting collagen and elastic tissue are described froin the standpoint of their pathogenesis and pathophysi- ology. There is also a chapter on the comparative physiology of the der- mis and the relationship between its function and physical characteristics in different animals and body sites. Special reference is made to melan- ocytes and its pathology in pigmen- tary disorders of huinan and animal skin. Some of the sections of particular interest to the cosinetic chemist are those on the chemistry and molec- ular biology of collagen the physi- cal nature of the dermis and the elastic tissues in living skin dermaI cell populations and their pathologi- cal responses melanin and melan- ocytes and the biochemistry of pig- ment formation. The chapter on ageing of the der- mis is of special interest. This chap- ter reviews skin thickness and an in- strumental technique of charting it the physical and physiological changes that occur with age the