The two-stroke engine has been developed to a degree that was not thought possible a few years ago. One of its virtues is that it is mechanically very simple, which is a contributing factor to its widespread use and varied application. Here, engine-tuning expert A. Graham Bell takes the reader through the various modifications that can be made to a two-stroke and its components to give maximum useable power output and mechanical reliability. 'the words happily avoid textbook syndrome'

Permaculture is an approach to sustainable living that is spreading throughout the world. Working entirely in harmony with nature, The Permaculture Garden shows you how to turn a bare plot into a beautiful and productive garden. Learn how to plan your garden for easy access and minimum labour; save time and effort digging and weeding; recycle materials to save money; plan crop successions for year-round harvests; save energy and harvest water; and garden without chemicals by building up your soil and planting in beneficial communities. Full of practical ideas for structures, children's areas and garden designs, this perennial classic, first published in 1994, is guaranteed to inspire, inform and entertain.

First published more than 30 years ago and in continuous print ever since, this remains one of the most comprehensive references available to the enthusiast engine tuner and race engine builder. Drawing on the author’s many years of practical experience in tuning and modifying high-performance road, rally and race units, every aspect of an engine’s operation is explained and analysed. Detailed modifications and improvements are suggested and described in the author’s practical, down-to-earth style, making this book essential reading for anyone involved in building high-performance engines.

Originally published in 1982, The Masterpiece of Nature examines sex as representative of the most important challenge to the modern theory of evolution. The book suggests that sex evolved, not as the result of normal Darwinian processes of natural selection, but through competition between populations or species - a hypothesis elsewhere almost universally discredited. The book also discusses the nature of sex and its consequences for the individual and for the population, as well as various other theories of sex. Since the value of these theories is held to reside wholly in their ability to predict the patterns of sexuality observed in nature, the book seeks to provide an extensive review of the circumstances in which sexuality is attenuated or lost throughout the animal kingdom, and these facts are then used to weigh up the merits of the rival theories. This book will be of interest to researchers in the area of genetics, ecology and evolutionary biology.

The Permaculture Way shows us how to consciously design a lifestyle which is low in environmental impact and highly productive. It demonstrates how to meet our needs, make the most of resources by minimizing waste and maximizing potential, and still leave the Earth richer than we found it.

Originally published in 1982, The Masterpiece of Nature examines sex as representative of the most important challenge to the modern theory of evolution. The book suggests that sex evolved, not as the result of normal Darwinian processes of natural selection, but through competition between populations or species - a hypothesis elsewhere almost universally discredited. The book also discusses the nature of sex and its consequences for the individual and for the population, as well as various other theories of sex. Since the value of these theories is held to reside wholly in their ability to predict the patterns of sexuality observed in nature, the book seeks to provide an extensive review of the circumstances in which sexuality is attenuated or lost throughout the animal kingdom, and these facts are then used to weigh up the merits of the rival theories. This book will be of interest to researchers in the area of genetics, ecology and evolutionary biology.

The deep sea covers more than half the surface of the Earth, but until the circumnavigation made by the HMS Challenger almost nothing was known about the animals that live there. Full Fathom 5000 gives an account of the remarkable discoveries that were made during the voyage and describes the strange and bizarre creatures that live in perpetual darkness a kilometer or more below the surface of the sea. Until the early 1870s, very little was known about the creatures lurking in the depths of our oceans. People had found a few things trapped in fishing gear or caught on the anchors of ships, but those who tried to venture to the bottom of the seafloor often died before they made it there. The first systematic investigation into life in our oceans was made during the circumnavigation of the HMS Challenger. Scientists credit this voyage as the beginning of modern oceanography, and the story of it is full of twists and turns. It led to the discovery of a whole new fauna previously unknown, which Full Fathom 5000 describes for the first time in one place for readers. In this book, Graham Bell takes readers through the voyage station by station, following the progress of the expedition and introducing some of the new and strange animals that were hauled up from the depths of the ocean and seen by human eyes for the first time. You will meet, among others, the ugliest fish in the world, flesh-eating clams, dwarf males, sea devils, and an octopus that wears lipstick. The book begins with a description of the first attempts scientists made to explore the deep sea, leading up to the plan for a voyage around the world on the HMS Challenger. The chapters take readers from station to station, though all of the world's oceans, visiting every continent and crossing the Equator five times. Bell details what was discovered during hundreds of stops to take samples, and he describes around a hundred stations where remarkable animals were hauled from the sea. The book ends with a description of what came after the end of this journey, explaining what they did with the animals that were collected and what became of the scientists and sailors who planned the voyage and traveled together around the world.

Thisbookhasbeenwritten tomake a pointand tofulfill a need. Thepoint is that the importance and the distinctiveness of the process of selection have been undervalued by most biologists. There is, consequently, the need for a book that describes the principles of selection in a simple but reasonably comprehensive way. Selection Is a Distinct Kind ofProcess Although we are now well into the second century of Darwinism, the theorythatDarwinand Wallaceannouncedin 1858hasnotyetmademuch progress beyond a small coterie of professional biologists. The reason is thatit isjarringlyunfamiliar toournormalexperienceofhow things come to be. Few ofus would be able to design a light bulb or a lathe, still fewer the computerand itsattendant softwarewithwhich this sentence is being written. But we all have a clear idea of what is meant by "design," and we readily, too readily, transfer this notion to the natural world. A light bulb or a lathe are prefigured in the mind, and constructed according to a plan. It is entirely reasonable to assume that beetles and daisies must be constructed after the same fashion, especially because they are much morecomplicatedthananythingthathumaningenuityhassofarmanaged to devise. There is, however, a second route to complex organization, throughtheselectionofrandomvariantsthatpropagatenearlyexactcopies ofthemselves. Itisofverylittleconsequenceinourdailylives, becauseifis somuchmorelaboriousandexpensivethandeliberatedesign. However, it isanotherwayofconstructingthings. Indeed, sofarasIknow, itistheonly other way of constructing things that we have ever been able to imagine.

This is the first detailed treatment of the long-standing, previously unresolved controversy surrounding the nature of senescence in clonal cultures. Part historical review of the literature, part detective story, Sex and Death in Protozoa presents a comprehensive but entertaining discussion of the sometimes contradictory evidence for protozoan senescence and the rejuvenating effects of sex in these organisms. Drawing on Hermann Muller's "ratchet model," Dr. Bell demonstrates in a quantitative fashion how genetic recombination (an intrinsic part of the sexual process) can eliminate the deleterious effects of accumulated mutations in clonal cultures and provide the rejuvenating effects associated with mating. This well written account by one of the leading authorities in the field is indispensable reading for those interested in the genetics and cell biology of protozoa, and more generally, those researchers and students interested in the phenomenon of senescence.

This is the first detailed treatment of the long-standing, previously unresolved controversy surrounding the nature of senescence in clonal cultures. Part historical review of the literature, part detective story, Sex and Death in Protozoa presents a comprehensive but entertaining discussion of the sometimes contradictory evidence for protozoan senescence and the rejuvenating effects of sex in these organisms. Drawing on Hermann Muller's "ratchet model," Dr. Bell demonstrates in a quantitative fashion how genetic recombination (an intrinsic part of the sexual process) can eliminate the deleterious effects of accumulated mutations in clonal cultures and provide the rejuvenating effects associated with mating. This well written account by one of the leading authorities in the field is indispensable reading for those interested in the genetics and cell biology of protozoa, and more generally, those researchers and students interested in the phenomenon of senescence.

For businesses to grow and be successful their approach to resilience must be defined by a holistic and risk-focused outlook, rather than one which is narrow and dominated by event-oriented continuity practices. The Organizational Resilience Handbook shows that success is as much to do with innovation and the speed with which new products are brought to market as it is with organizations having to deal with unexpected crisis situations. It comprehensively covers the full breadth and depth of the field and introduces related topics such as security, safety, e-commerce, emerging technologies and customer experience. Through adopting a strategic and progressive approach, practitioners can apply the book's methodology to develop an in-depth understanding of resilience within their own organization and use it to effectively engage with the board and senior management in developing strategies for achieving greater resilience capability. A range of high-profile case studies, such as Mercedes, the UK's National Health Service, Alibaba and BP, help to illustrate the concept of resilience by detailing characteristics and behaviours which confirm its meaning. The Organizational Resilience Handbook is a practical guide to self-assessment, benchmarking performance and implementing resilience frameworks in any organization.

For businesses to grow and be successful their approach to resilience must be defined by a holistic and risk-focused outlook, rather than one which is narrow and dominated by event-oriented continuity practices. The Organizational Resilience Handbook shows that success is as much to do with innovation and the speed with which new products are brought to market as it is with organizations having to deal with unexpected crisis situations. It comprehensively covers the full breadth and depth of the field and introduces related topics such as security, safety, e-commerce, emerging technologies and customer experience. Through adopting a strategic and progressive approach, practitioners can apply the book's methodology to develop an in-depth understanding of resilience within their own organization and use it to effectively engage with the board and senior management in developing strategies for achieving greater resilience capability. A range of high-profile case studies, such as Mercedes, the UK's National Health Service, Alibaba and BP, help to illustrate the concept of resilience by detailing characteristics and behaviours which confirm its meaning. The Organizational Resilience Handbook is a practical guide to self-assessment, benchmarking performance and implementing resilience frameworks in any organization.

This book adopts an experimental approach to understanding the mechanisms of evolution and the nature of evolutionary processes, with examples drawn from microbial, plant and animal systems. It incorporates insights from remarkable recent advances in theoretical modeling, and the fields of molecular genetics and environmental genomics.
Adaptation is caused by selection continually winnowing the genetic variation created by mutation. In the last decade, our knowledge of how selection operates on populations in the field and in the laboratory has increased enormously, and the principal aim of this book is to provide an up-to-date account of selection as the principal agent of evolution. In the classical Fisherian model, weak selection acting on many genes of small effect over long periods of time is responsible for driving slow and gradual change. However, it is now clear that adaptation in laboratory populations often involves strong selection acting on a few genes of large effect, while in the wild selection is often strong and highly variable in space and time. Indeed these results are changing our perception of how evolutionary change takes place. This book summarizes our current understanding of the causes and consequences of selection, with an emphasis on quantitative and experimental studies. It includes the latest research into experimental evolution, natural selection in the wild, artificial selection, selfish genetic elements, selection in social contexts, sexual selection, and speciation.
Selection: The Mechanism of Evolution is an advanced textbook suitable for senior undergraduate and graduate students taking courses in evolutionary biology, ecology, populationgenetics, and experimental evolution. It will also be a valuable reference tool for those professional researchers in these fields requiring an authoritative and up-to-date overview of the topic, as well as providing an accessible treatment of evolutionary mechanisms for molecular and cellular biologists.

Thisbookhasbeenwritten tomake a pointand tofulfill a need. Thepoint is that the importance and the distinctiveness of the process of selection have been undervalued by most biologists. There is, consequently, the need for a book that describes the principles of selection in a simple but reasonably comprehensive way. Selection Is a Distinct Kind ofProcess Although we are now well into the second century of Darwinism, the theorythatDarwinand Wallaceannouncedin 1858hasnotyetmademuch progress beyond a small coterie of professional biologists. The reason is thatit isjarringlyunfamiliar toournormalexperienceofhow things come to be. Few ofus would be able to design a light bulb or a lathe, still fewer the computerand itsattendant softwarewithwhich this sentence is being written. But we all have a clear idea of what is meant by "design", and we readily, too readily, transfer this notion to the natural world. A light bulb or a lathe are prefigured in the mind, and constructed according to a plan. It is entirely reasonable to assume that beetles and daisies must be constructed after the same fashion, especially because they are much morecomplicatedthananythingthathumaningenuityhassofarmanaged to devise. There is, however, a second route to complex organization, throughtheselectionofrandomvariantsthatpropagatenearlyexactcopies ofthemselves. Itisofverylittleconsequenceinourdailylives,becauseifis somuchmorelaboriousandexpensivethandeliberatedesign. However,it isanotherwayofconstructingthings. Indeed, sofarasIknow, itistheonly other way of constructing things that we have ever been able to imagine.

This textbook gives a complete and easy-to-use account of the basic principles governing the central concept of evolutionary theory: selection. It describes how the experimental study of evolution has elucidated the process of selection and how it drives evolutionary change. Graham Bell, an internationally recognized evolutionary biologist, has written a simple text that avoids mathematical arguments or technical details, while giving a rigorous introduction to the field. The book is organized as a series of short sections, each designed to make a particular point, and illustrated whenever possible by experimental results. The Basics of Selection is the only textbook to give a comprehensive coverage of the process of selection. Its simple style and logical organization makes it readily accessible to all undergraduate and graduate students taking courses in evolution, evolutionary or ecological genetics, or any allied field in biology.

When Brian de Jongh's two classic Companion Guides, Southern Greece and Mainland Greece, were first published they were greeted with acclaim and immediately established themselves as essential guides. They have now been combined into this single volume, covering the whole of the Greek mainland. This new edition has been thoroughly revised by John Gandon (Brian de Jongh's nephew) and Geoffrey Graham-Bell, taking into account both new archaeological discoveries and recent development. Brian de Jongh combined an expert knowledge of history, archaeology and mythology with a profound understanding of the Greek people and a feeling for the landscape which inspired their myths and monuments: he describes a country that he loved and much of which Pausanias, writing almost two thousand years ago, would still recognise. This book is, more than ever, the most indispensable of all modern guides to Greece.

This book adopts an experimental approach to understanding the mechanisms of evolution and the nature of evolutionary processes, with examples drawn from microbial, plant and animal systems. It incorporates insights from remarkable recent advances in theoretical modelling, and the fields of molecular genetics and environmental genomics. Adaptation is caused by selection continually winnowing the genetic variation created by mutation. In the last decade, our knowledge of how selection operates on populations in the field and in the laboratory has increased enormously, and the principal aim of this book is to provide an up-to-date account of selection as the principal agent of evolution. In the classical Fisherian model, weak selection acting on many genes of small effect over long periods of time is responsible for driving slow and gradual change. However, it is now clear that adaptation in laboratory populations often involves strong selection acting on a few genes of large effect, while in the wild selection is often strong and highly variable in space and time. Indeed these results are changing our perception of how evolutionary change takes place. This book summarizes our current understanding of the causes and consequences of selection, with an emphasis on quantitative and experimental studies. It includes the latest research into experimental evolution, natural selection in the wild, artificial selection, selfish genetic elements, selection in social contexts, sexual selection, and speciation.