Prism and Lens Making: A Textbook for Optical Glassworkers, Second Edition is a unique compendium of the art and science of the optical working of glass for the production of mirrors, lenses, and prisms. Incorporating minor corrections and a foreword by Professor Walter Welford FRS, this reissue of the 1957 edition provides a wealth of technical information and hands-on guidance gained from a lifetime of experience. Although some of the techniques have been replaced by more modern methods, this classic book is still a valuable source of practical assistance as well as being a pleasure to read.
About the Author
Frank Twyman was a skilled craftsman in all aspects of optics. He joined Otto Hilger in 1898 to work on the production of simple spectroscopes costing less than ?10 each. After the death of Otto Hilger, Twyman became Managing Director of Adam Hilger Ltd., a company known for the finest quality optical and mechanical work. He worked here from 1902 to 1946 and was very concerned with the practical aspects of instrument making; he designed many of the instruments himself and constantly strove to improve the techniques of optical grinding and polishing. In 1916 Twyman and Alfred Green, the foreman of the Hilger optical shops, patented the now-famous prism and lens testing interferometer that bears their names. Twyman also undertook fundamental studies in the annealing process for glass and invented new spectrophotometers and spectrographs.

When an upset Orla runs into the woods, she bumps into a strange wizard called Burt. She asks to be turned into her favourite comic book character, a magical unicorn named Midnight Wing. Can Burt help her?

A new edition of a classic text This new edition of Human Development has been thoroughly revised and updated to incorporate recent developments in the field. New material is introduced on the development of a sense of self, the social self and moral development. Beginning with a discussion of birth and childhood, the reader is lead through each of the crucial stages in human development. The authors reveal the intricate interplay between physical, emotional and psychological factors that contribute to the individual patterns of development that make each of us unique. All of the major milestones of life are covered, including adolescence, work, parenthood and old age. Employing psychoanalytic theories of development, this book reveals the richness that these ideas bring to well-known everyday phenomena. This highly accessible and jargon-free introduction to human development combines scientific objectivity with a sensitive and sympathetic approach to the subject. It will prove invaluable to anyone involved in the helping professions.

"Shows us that we all have the power to create peace and change in the world." -Marianne Williamson, author, Return to Love Traveling in 1995 around war-torn Bosnia and Croatia, where he had gone to stage a peace concert, this author encountered The Emissaries: a small group of mystics who meditated 12 hours a day. He went on to detail their message-that humanity was now ready to create a new world-in a book that was translated into more than a dozen languages. This new edition provides behind-the-scenes information about the people met on that trip and offers additional commentary on the monks' compelling mystic vision.

Advanced Molecular Biology emphasises the unifying principles and mechanisms of molecular biology, with frequent use of tables and boxes to summarise experimental data and gene and protein functions. Extensive cross-referencing between chapters is used to reinforce and broaden the understanding of core concepts. This is the ideal source of comprehensive, authoritative and up-to-date information for all those whose work is in the field of molecular biology.

Prism and Lens Making: A Textbook for Optical Glassworkers, Second Edition is a unique compendium of the art and science of the optical working of glass for the production of mirrors, lenses, and prisms. Incorporating minor corrections and a foreword by Professor Walter Welford FRS, this reissue of the 1957 edition provides a wealth of technical information and hands-on guidance gained from a lifetime of experience. Although some of the techniques have been replaced by more modern methods, this classic book is still a valuable source of practical assistance as well as being a pleasure to read. About the Author Frank Twyman was a skilled craftsman in all aspects of optics. He joined Otto Hilger in 1898 to work on the production of simple spectroscopes costing less than 10 each. After the death of Otto Hilger, Twyman became Managing Director of Adam Hilger Ltd., a company known for the finest quality optical and mechanical work. He worked here from 1902 to 1946 and was very concerned with the practical aspects of instrument making; he designed many of the instruments himself and constantly strove to improve the techniques of optical grinding and polishing. In 1916 Twyman and Alfred Green, the foreman of the Hilger optical shops, patented the now-famous prism and lens testing interferometer that bears their names. Twyman also undertook fundamental studies in the annealing process for glass and invented new spectrophotometers and spectrographs.

Unsatisfied with the relentless pace and narrow constraints of social media, two Americans, Winkfield Twyman, Jr. and Jennifer Richmond — a black man and a white woman — rediscovered the art of letter writing and maintained a years-long correspondence about race in the United States. In Letters in Black and White, they share their exchanges in full for the first time, charting their journey from wary strangers to trusted confidants. At a time when many Americans are dazed, confused, and angered by the country’s current state of race relations, they offer a model not only for having those needed but difficult conversations but also for a better way forward. Marked by well-crafted turns of phrase, sharp wit, and sober reflection, they intentionally avoid those fashionable words and phrases that have been drained of real meaning or hopelessly saddled with excessive baggage, such as antiracism, white fragility, allyship, and wokeness. Rather, on topics ranging from the murder of George Floyd to the launch of the 1619 Project to the debate over reparations, they tell the truth as they see it in their own uncorrupted language, speaking for no one but themselves. Particularly critical of the ideological battles that fuel media programming and entrench political rivalries and the noble-sounding social and cultural projects that fail time and again to offer any meaningful solutions, they identify productive ways to unify across our differences, to find our common humanity, and to mend America’s divided soul. Ultimately, they offer an inspirational message of hope and optimism for all — one that does not allow the past to define our present or determine our future.

This text critically locates development research within the field of international development to give an accessible and comprehensive introduction to development research methods.

Research and Fieldwork in Development explores both traditional and cutting edge research methods, from interviews and ethnography to spatial data and digital methods. Each chapter provides the reader with an understanding of the theoretical basis of research methods, reflects upon their practice and outlines appropriate analysis techniques. The text also provides a cutting edge focus on the role of new media and technologies in conducting research. The final chapters return to a set of broader concerns in development research, providing a new and dynamic set of engagements with ethics and risk in fieldwork, integrating methods and engaging development research methods with knowledge exchange practices. Each chapter is supported by several case studies written by global experts within the field, documenting encounters and experiences and linking theory to practice. Each chapter is also complimented by an end of chapter summary, suggestions for further reading and websites, and questions for further reflection and practice.

This book provides an invaluable overview to the practice of international development research and serves as an essential resource for undergraduate and postgraduate student embarking of development fieldwork. It is supported by online resources including extended bibliographies for each chapter, example risk and ethic forms, example policy briefing notes, research reports, links to websites and data sources.

This is a comprehensive study of the 2015 general election in Britain designed not only for students and scholars of British politics, but also for the interested reader. It looks at the record of the Coalition government both in terms of its plans and performance, particularly in relation to the economy, as the starting point for understanding what happened. The authors go on to examine the campaign during the run-up to polling day and to explain why people voted the way they did. They also take a close look at the various constituency battlegrounds across the country showing how and why voting patterns varied across Britain. Finally, they discuss the implications of the election outcome for the future of the party system and British politics more generally. This book provides important insights into an election which has permanently changed the political geography of Britain.

Coverage of the field in Instant Notes in Developmental Biology is current and focuses largely on the principles of embryonic development. It is designed to provide a clear summary of the principles of developmental biology in a compact and easily manageable structure.

Principles of Proteomics, Second Edition, provides a concise and user-friendly introduction to the diverse technologies used for the large-scale analysis of proteins, as well as their applications, and their impact in areas such as drug discovery, agriculture, and the fight against disease. Proteomics is a fast-advancing field in which researchers seek to capture all the proteins in the cell and characterize them in ever more detail. Principles of Proteomics has been fully updated to reflect the most recent developments in the field without losing its focus on the underlying principles. With worked examples, case studies profiling both established and emerging technologies, and further reading lists for each chapter, Principles of Proteomics is an ideal introduction for students, researchers and those working in the industry.

An examination of the papal adventus ceremony, deriving from the ritual reception performed for the ruler in antiquity, and the changes it underwent during the century. This book examines the character and significance of the adventus ceremonies which were accorded to medieval popes and for which there is much evidence in the twelfth-century sources. The papal adventus, hitherto unstudied in anylanguage, retained the framework and much of the familiar symbolism of the ritual reception performed for the ruler in antiquity. During the twelfth century it was performed for popes with unprecedented frequency, providing, in particular, a vital part of the papal accession ritual. On such occasions adventus represented a demonstration of consent to rule, a sense that was expressed through traditional idioms evoking the triumph of the ruler. But the meaning of the ritual altered towards the end of the century as a result of the breakdown of relations between the papacy and the Romans, and the adventus provided an opportunity for the Romans to express their own agenda wherein consent meant the right of acceptance or veto by the people. Dr SUSAN TWYMAN teaches in the Faculty of Continuing Education, Birkbeck College, London University.

This book is a volume in the Penn Press Anniversary Collection. To mark its 125th anniversary in 2015, the University of Pennsylvania Press rereleased more than 1,100 titles from Penn Press's distinguished backlist from 1899-1999 that had fallen out of print. Spanning an entire century, the Anniversary Collection offers peer-reviewed scholarship in a wide range of subject areas.

This text critically locates development research within the field of international development to give an accessible and comprehensive introduction to development research methods.

Research and Fieldwork in Development explores both traditional and cutting edge research methods, from interviews and ethnography to spatial data and digital methods. Each chapter provides the reader with an understanding of the theoretical basis of research methods, reflects upon their practice and outlines appropriate analysis techniques. The text also provides a cutting edge focus on the role of new media and technologies in conducting research. The final chapters return to a set of broader concerns in development research, providing a new and dynamic set of engagements with ethics and risk in fieldwork, integrating methods and engaging development research methods with knowledge exchange practices. Each chapter is supported by several case studies written by global experts within the field, documenting encounters and experiences and linking theory to practice. Each chapter is also complimented by an end of chapter summary, suggestions for further reading and websites, and questions for further reflection and practice.

This book provides an invaluable overview to the practice of international development research and serves as an essential resource for undergraduate and postgraduate student embarking of development fieldwork. It is supported by online resources including extended bibliographies for each chapter, example risk and ethic forms, example policy briefing notes, research reports, links to websites and data sources.

In this newly revised and updated edition, James F. Twyman shows you how to unlock the ancient power of the Moses Code to create miracles and compassion in our world. The Moses Code was first used 3,500 years ago to create some of the greatest miracles in the history of the world. Shortly afterwards, influential leaders decreed that the inherent energy was simply too vast and potentially dangerous to be used by anyone other than the highest initiates, so it was hidden away. In this new edition of his insightful book, James F. Twyman uncovers the Code, showing how it can be used to create miracles. At the very heart of the Moses Code is the true function and practice of the Law of Attraction. With new information and teachings, James explains that it's now time for the modern world to master the Code - not just to receive riches but to create a world based upon the laws of compassion and peace. James reveals that we all have an essential and individual role to play and that whatever the soul genuinely feels, the world and everything in it will transform in order to match that belief.

Records Copied From The Official Manuscripts And Scrolls, Made By The Senatorial Courts Of Tiberius Caesar, And By The Sanhedrin, In The Days Of Jesus, Entitled The Christ, Found In The Libraries At Rome And Constantinople.

This book outlines in detail the ancient dragon bloodline, going much further than his previous book, Genesis of the Grail Kings, co-authored with Sir Laurence Gardner. Where did the bloodline come from and what did it mean? Were those who carried it blessed with great powers? What influence did they have on the ancient world? Did elves, fairies and vampires really exist? If so, who were they? This extremely well-researched book reveals many mysteries from our past, including why the actual blood from this bloodline is so important, what kind of magic once existed and how it was lost.