58 JOURNAL OF THE SOCIETY OF COSMETIC CHEMISTS scanning the pages to enter these reveal as many again. There are a fantastic number of obvious trivial errors, so many in fact that one wonders about the accuracy of the factual data. Nevertheless. despite its many shortcomings this book contains an exceptional volume of information and will be found an invaluable source-book for all working with perfume and flavour materials. The binding is not robust enough to stand up to the handling the book will undoubtedly get but an improvement in this direction would most likely result in a substantial increase in price. One cannot help thinking, however, how much better an impression the book would give it if were integrated into a unified whole, instead of being three separate books in one binding, and if most of the trivial errors were edited out. R.P. REEVES. STRUCTURE AND BONDING, Vol. 5. Editors: C. K. Jorgensen, J. B. Neilands, Sir Ronald S. Nyholm, D. Reinen and R. J. P. Williams. Pp. 149 -b Ill. (1968). Springer-Verlag, Berlin, Heidelberg, New York. DM 32. $8.00. The fifth volume in this series which specialises in problems of chemical structure and bonding contains five papers. "Biochemical aspects of iron-sulphur linkage in non-heme iron protein, with special reference to adrenodoxin" (T. Kimura) deals with a class of proteins which serve as oxidation-reduction components in various biological systems involved in anaerobic fermentative metabolism, photosynthesis, and hydroxylation reactions. This class excludes the iron-transferring (e.g. ferritin) and oxygen-transferring (e.g. hemerythrin) non-heme iron proteins, and is also differentiated from the iron flavo- proteins (e.g. succinic dehydrogenase). The main example of the class examined in this paper is adrenodoxin, which is a component in the enzyme complex concerned in steroid hydroxylation. "Reaction of some transition metals with nucleic acids and their constituents" (U. Weser) surveys studies of transition metal interactions with monomer and polymer units of nucleic acids. The biological functions of transition metals in proteins are widely recognised, but there seems as yet to be little evidence to indicate a biological role for them in nucleic acid metabolism. "A perturbation representation of weak covalent bonding" (C. E. Schaffer) is a theoretical discussion of weak covalent bonding between a central ion and a ligator atom. "Problem und Modell der homogenen Katalyse" (W. Strohmeier) discusses problems involved in the design of catalysts of optimal structure for a specific reaction. "Thermodynamics of complex formation between hard and soft acceptors and donors" (S. Ahrland) discusses the nature of the co-ordinate bond in the light of classification of the components in scales of softness. B.G. OVERELL.

Society of Cosmetic Great Britain Chemists of 1968 DIPLOMA EXAMINATION Borough Polytechnic PAPER I (Monday, 17th June 1968) Candidates should answer FIVE questions from not less than FOUR sections. SECTION A 1. Clearly distinguish between the following product types giving typical formulae wherever possible. (a) Clear and creme shampoos (b) Temporary and permanent waving lotions (c) Hair conditioners and hair sprays (d) Oxidation and nitro hair dyes. 2. Describe in detail the various stages of hair growth from initial formation to final hair fall. Discuss the importance of sebum in relation to hair. . SECTION B Describe typical raw materials used in the manufacture of face powder and indicate the purpose for •vhich each raw material is used. Give brief details of the normal manufacturing processes employed for the manufacture of loose face powders. (a) Give the general formula of a solid fragrance of the soap-gel type and brief details of the equipment used in the manufacture of such a product. (b) Write a short account of the various types of face masks available indicating the special features of each type.