Quaternary Sediments: Petrographic Methods for the Study of Unlithified Rocks (Second Edition), first published in 1991, deals with the analysis of sediments, soils and weathering products to reconstruct the environment of the Quaternary period. Not only does it cover all physical and chemical laboratory techniques but it also describes the use of required equipment, the evaluation of both strengths and weaknesses of each technique and how to get and interpret results. The application of each method in solving particular geological problems is stressed. Case studies, diagrams and full biographies provide the reader with further information. The Second Edition contains a new chapter titled "Second Thoughts" which includes Prologue Errors and error propagation Sampling for particle-size analysis The interpretation of loss on ignition data as a measure of plant organic content Dealing with geochemical data Dry bulk density Reference. The index has also be updated to include the new material.

This fourth volume in the series opens some new arenas in the realm of molten salts technology, with research reports on amides, amide mixtures, and their electrochemical properties; chromatography in liquid organic salts; thermal conductivity; magnetic, calorimetric, and ultra-high-pressure measure

First published in 1981. Settling the Desert is an attempt to organise those aspects of scientific and sociological research that are the necessary prerequisites for making the desert a comfortable and profitable place for man to inhabit. In this book, experts from many fields of desert research review the history of desert settlement and agriculture, as well as the present problems encountered by modern desert settlers. Topics discussed include: meteorology, sociology, ecology, water resources, solar energy, innovative desert agriculture, architecture, and animal science.

This second volume carries on the excellent work of its predecessor, ex tending its scope to other melts and to other techniques. It continues to present first-hand understanding and experience of this difficult and demanding field. There is ever present the trade-off or reconciliation between the novel chemistry of systems not dominated by the mediating influence of a supposedly indifferent solvent and the high temperatures required to effect the fluidity of the system. At the limit, the very high temperatures so increase the rates of all reactions as to dissolve the temporal difference between the thermodynamic and the kinetic view of chemistry. What can happen will happen and invariably does happen. Vessels corrode, the apparatus becomes a reactant, and the number of tolerant materials able to withstand the attack shrinks to graphite, boron carbide or, if all else fails, to frozen parts of the molten salt itself. It is probably true that there is no limit to man's ingenuity but I believe that God gave us molten salts just to test that thesis. If there is ever a Molten Salt Club, and Englishmen love clubs, its membership will be exclusive. It would certainly include the authors of this series. Graham Hills University of Strathclyde ix Preface In the first volume of this series, we expressed our contention that a real need existed for practical guidance in the field of molten salt experimentation."

POPULATION GENETICS IS OFTEN THOUGHT TO BE A DIFFICULT SUBJECT. To some extent, difficulties are inevitable in a field where some quite basic points are controversial. However, problems are most acute when theoretical points are discussed, despite the fact that there has been very little controversy over the mathematics. In my experience, the actual mathematical manipulations rarely cause much difficulty. Rather it is that the biologist, lacking the physicist's or chemist's experience in "reading" mathematical formulae, finds it difficult to appreciate what is happening in a mathematical treatment and to grasp the implications of the results obtained, when these are given in mathematical form. Accordingly, I have followed a procedure, which students seem to find helpful, of giving a rough-and-ready verbal treatment of a problem before attempting a much more exact mathematical treatment; when the results of the latter are not readily interpretable, I have given an elucidation. Another problem which often concerns students is the reliability of results obtained using approximate methods; I have, therefore, discussed this in fair detail in critical cases. When dealing with controversial issues, I have done my very best to be fair. To conceal one's opinions entirely would probably make for a very dull book. I trust, however, that I have given enough for the reader previously unfamiliar with these controversies to form his own judge ment."

The physicist Kamerlingh Onnes, who was the first to liquify helium (1908), had written on the walls of his laboratory in Leiden: "From measur ing to knowing." As true as this is at very low temperatures, it is just as applicable at the high temperatures of molten salts. Only on the basis of exact measurements by a plethora of experimental methods can any real understanding be reached of both classes of liquids. In both temperature ranges experimental difficulties are much greater than those encountered around ambient temperature. Molten salts often present a formidable challenge to the experimen talist, for example, because of corrosion and other materials problems. Applications of molten salts were for a long time based on empirical knowledge alone. This was true for the first application of molten salts in 1807, when Davy obtained sodium and potassium by electrolysis of the molten hydroxides. For 100 years the winning of aluminum has been based on the very nearly simultaneous invention by Hall and Heroult (1886) of the electrolysis of molten cryolite. The process, though essentially unchanged, has since been perfected owing to an improvement in our understanding of what actually happens, based on difficult measurements ofthe many variables. However, even now there are gaps in our knowledge."

The intention of this monograph has been to assimilate key practical and theoretical aspects of those spectroelectrochemical techniques likely to become routine aids to electrochemical research and analysis. Many new methods for interphasial studies have been and are being developed. Accordingly, this book is restricted in scope primarily to in situ methods for studying metal! electrolyte or semiconductor! electrolyte systems; moreover, it is far from inclusive of the spectroelectrochemical techniques that have been devised. However, it is hoped that the practical descriptions provided are sufficiently explicit to encourage and enable the newcomer to establish the experimental facilities needed for a particular problem. The chapters in this text have been written by international authorities in their particular specialties. Each chapter is broadly organized to review the origins and historical background of the field, to provide sufficiently detailed theory for graduate student comprehension, to describe the practical design and experimental methodology, and to detail some representative application examples. Since publication of Volume 9 of the Advances in Electrochemistry and Electrochemical Engineering series (1973), a volume devoted specifically to spectroelectrochemistry, there has been unabated growth of these fields. A number of international symposia-such as those held at Snowmass, Colorado, in 1978, the proceedings of which were published by North-Holland (1980); at Logan, Utah in 1982, published by Elsevier (1983); or at the Fritz Haber Institute in 1986-have served as forums for the discussion of nontraditional methods to study interphases and as means for the dissemination of a diversity of specialist research papers.

A. POLJAKOFF-MAYBER and J. GALE The response of plants to saline environments is of interest to people of many disciplines. In agriculture the problem of salinity becomes more severe every year as the non-saline soils and the non-saline waters become more intensively and more extensively exploited. Further expansion of agriculture must consider the cultivation of saline soils and the use of water with a relatively high content of soluble, salts. Moreover, industrial development in many countries is causing severe water pollution, especially of rivers, and mismanagement in agriculture often induces secondary salinization of soils and sources of irrigation water. From the point of view of agriculture it is, therefore, of the utmost importance to know the various responses of plants to salinity and to understand the nature of the damage caused by salinity to agricultural crops. Botanists and plant physiologists study plants, their form, growth, metabolism and response to external stimuli. A challenging problem for them is to understand the differences between glycophytes, plants growing in a non-saline environment and halophytes, plants which normally grow in salt marshes, in sea water or in saline soils. This includes the elucidation of structural and functional adaptations which enable halophytes to tolerate the saline environment, and also questions as to whether they only tolerate the saline environment or actually thrive in it. Ecologists and environmentalists are interested in the interrelationships be tween the organism, in this case the plant, and its environment, from the climatic, edaphic and biotic points of view."

It has been always an incentive for students to find whether his/her efforts to solve exercises give correct results, or to find tips for problems that he/she finds more difficult. These are the main reasons for the appearance of the present book. As part of the textbook Modern Electrochemistry 1: Ionics, A Guide to Problems in Modern Electrochemistry: Part 1: Ionics compiles many of the solutions to the exercises and problems presented in the text, as well as many new problems.

The rise of the neutral theory of evolution has aroused a renewed interest in the quantitative approach to population genetics, and the aim of this book is to explain this field to biologists with a limited amount of mathematical expertise. The text concentrates almost entirely on stochastic processes, as these seem to be the greatest source of difficulty amongst non-mathematicians. To enhance the flow of the text some points of detail have been placed in notes and exercises sections at the end of each chapter. The material is extensively referenced and contains many carefully worked examples of mathematical proofs.

Recent literature raises the specter of "warrior societies" and questions if we are prepared to face them in battle. Looking back at American history, the American Indians were a warrior society that posed many asymmetrical challenges for European and American militaries. In particular, their individual skills, methods of fighting, and societal culture produced asymmetries that are still relevant today. This paper examines these particular aspects, determines successful counters to these asymmetries in the American Indian experience, and posits potential implications for today.