Mycoplasmas are the smallest of free-living organisms and are intermediate between viruses and bacteria. Many species thrive as parasites in animal (including human) hosts. This book is based on proceedings of a conference held in Palermo, Italy. It reviews some of the most important mycoplasma diseases of sheep, goats and cattle including contagious bovine pleuropneumonia, contagious agalactia and calf pneumonia, which are listed by the OIE because of their economic implications.
Photography emerged in 1839 in two forms simultaneously. In France, Louis Daguerre produced photographs on silvered sheets of copper, while in Great Britain, William Henry Fox Talbot put forward a method of capturing an image on ordinary writing paper treated with chemicals. Talbot’s invention, a paper negative from which any number of positive prints could be made, became the progenitor of virtually all photography carried out before the digital age. Talbot named his perfected invention "calotype," a term based on the Greek word for beauty. Calotypes were characterized by a capacity for subtle tonal distinctions, massing of light and shadow, and softness of detail. In the 1840s, amateur photographers in Britain responded with enthusiasm to the challenges posed by the new medium. Their subjects were wide-ranging, including landscapes and nature studies, architecture, and portraits. Glass-negative photography, which appeared in 1851, was based on the same principles as the paper negative but yielded a sharper picture, and quickly gained popularity. Despite the rise of glass negatives in commercial photography, many gentlemen of leisure and learning continued to use paper negatives into the 1850s and 1860s. These amateurs did not seek the widespread distribution and international reputation pursued by their commercial counterparts, nearly all of whom favored glass negatives. As a result, many of these calotype works were produced in a small number of prints for friends and fellow photographers or for a family album. This richly illustrated, landmark publication tells the first full history of the calotype, embedding it in the context of Britain’s changing fortunes, intricate class structure, ever-growing industrialization, and the new spirit under Queen Victoria. Of the 118 early photographs presented here in meticulously printed plates, many have never before been published or exhibited.
This is a long-overdue revision and expansion of what has become a classic book in marine literature. This lavishly illustrated volume provides exhaustive coverage of more than 90 percent of the region's reef fishes. Every species is thoroughly illustrated, including photographs of the juvenile, female and male in species that vary in appearance during their development. Besides the wide array of underwater and diagnostic laboratory photographs, the book also contains seven plates painted by the talented natural-history artist Roger Swainston. With an additional 32 pages and 90 photos (covering 60 new species in all), this revised and expanded edition will enable even a beginning layman to identify most of the region's reef fishes. Divers, anglers, underwater naturalists and professional biologists are equally catered to.
With Otisco Lake Community, Roger N. Trendowski chronicles this New York State Finger Lake area's history from the late 1800s to mid-1900s. Gathered from many local archives, private collections, and town historians from Otisco, Marcellus, and Spafford, the unique published and unpublished images show the area's natural beauty. The pictures transport us to the past where some of the same adventurous and entertaining activities still remain today.
Clonal animals, that is those that are genetically identical, are of great importance in biology. The supposed evolutionary advantages of sexual versus asexual reproduction are one of the central paradoxes of current evolutionary theory. The evolved strategy of asexual reproduction includes a large number of diverse species in many different groups, for example aphids, guppies, planktonic rotifers and others.
Old English is a companion to Old English studies and to historical studies of early English in general. It is also an introduction to Indo-European studies in the particular sense in which they underpin the history of English. Professor Roger Lass makes accessible in a linguistically up-to-date and readable form the Indo-European and Germanic background to Old English, as well as what can be reconstructed about the resulting state of Old English itself. His book is a bridge between the more elementary Old English grammars and the major philological grammars and recent interpretations of the Old English data.Old English assumes a basic knowledge of phonetics and phonology, the elements of syntactic and morphological theory, and an introduction to historical linguistics. An extensive glossary gives definitions of the major technical terms used.
Flow Measurement Handbook is a reference for engineers on flow measurement techniques and instruments. It strikes a balance between laboratory ideas and the realities of field experience and provides practical advice on design, operation and performance of flowmeters. It begins with a review of essentials: accuracy, flow, selection and calibration methods. Each chapter is then devoted to a flowmeter class and includes information on design, application installation, calibration and operation. Among the flowmeters discussed are differential pressure devices such as orifice and Venturi, volumetric flowmeters such as positive displacement, turbine, vortex, electromagnetic, magnetic resonance, ultrasonic, acoustic, multiphase flowmeters and mass meters, such as thermal and Coriolis. There are also chapters on probes, verification and remote data access.
Oliver Cromwell has been both applauded and reviled and his memory invoked in periods and in countries other than his own. This complex historiography has left us today with many different versions of Cromwell as man, general and statesman of which the conflicting images are the subject of this book.Available in paperback for the first time, this classic study is based on the unfinished magnum opus of the leading scholar of seventeenth-century history, Roger Howell (1936?89). It includes chapters by a team of leading international experts on a broad range of subjects originally planned by Howell himself. It includes Howell's studies of the reactions to Cromwell in the Restoration period and in the eighteenth and nineteenth centuries. Added to these are reprints of his essays on psychohistorical approaches to Cromwell and on Cromwell's contribution to English liberty. Further historiographical portraits of the Protector are offered in chapters which consider Cromwell and the Glorious Revolution; Carlyle's Cromwell; Irish images of the Protector; American interpretations; and the comparisons made between Cromwell and the twentieth-century dictators.
A legendary fusion of science fiction and horror, Ridley Scott's Alien (1979) is one of the most enduring films of modern cinema – its famously visceral scenes acting like a traumatic wound we seem compelled to revisit. Tracing the constellation of talents that came together to produce the film, Roger Luckhurst examines its origins as a monster movie script called Star Beast, dismissed by many in Hollywood as B-movie trash, through to its afterlife in numerous sequels, prequels and elaborations. Exploring the ways in which Alien compels us to think about otherness, Luckhurst demonstrates how and why this interstellar slasher movie, this old dark house in space, came to coil itself around our darkest imaginings about the fragility of humanity. This special edition features original cover artwork by Marta Lech.
Since 1066 when William the Conqueror (alias William the Bastard) took the throne, English and Scottish kings have sired at least 150 children out of wedlock. Many were acknowledged at court and founded dynasties of their own - several of today's dukedoms are descended from them. Others were only acknowledged grudgingly or not at all. In the twentieth century this trend for royals to father illegitimate children continued, but the parentage, while highly probable, has not been officially recognised. This book - split into four sections: Tudor, Stuart, Hanoverian and, perhaps most fascinating, Royal Loose Ends - is a genuinely fresh approach to British kings and queens, examining their lives and times through the unfamiliar perspective of their illegitimate children.
Islands are special places; they can be havens for unique plants and animals and refuges for wildlife. This book investigates the biogeography of butterfly species over the British islands, particularly the factors that influence their presence on the islands and that have made each island's butterfly fauna distinctive. The book contains a full log of records of species on the islands and much supporting information. The first three chapters set the scene, illustrating the basics of island biogeography theory, their changing circumstances during the current Holocene interglacial, and studies of natural history of British butterflies that mark the islands as the most intensively studied region for wildlife in the world. The book advances by increasing resolution downscale from a European continental perspective, through patterns and changes on the British mainland, a comparison of the two dominant islands of Britain and Ireland, to a close inspection of the dynamics of species on the multitude of offshore islands. Detailed investigations include contrasts in species' richness on the islands and then of the incidences of each species. Case studies highlight the continual turnover of species on islands. Attention is then given to evolutionary changes since the time that glaciers enveloped Europe. A powerful message is conveyed for the maintenance of butterfly species on the smaller British islands now experiencing population losses at a rate unprecedented since the spread of the last ice sheets: the incontrovertible importance of maintaining populations of species on nearby mainland sources for islands as pools for future migrants.
Understanding Housing Defects provides a concise, coherent and comprehensive introduction to the causes, investigation and diagnosis of defects in domestic buildings. For this new edition, many of the chapters have been substantially updated and new photographs have been added. There are four new chapters covering: How defects are defined An overview of building and architectural history External joinery and painted finishes Environmental and health- related building problems Many of the 21 chapters cover a specific building element and include a brief introduction setting out construction principles and the evolution of current practice. All of the chapters consider the identification, cause and diagnosis of common (and sometimes not so common) defects. This book is a must have for all those students and practitioners who require a broad understanding of housing defects. Building surveyors, general practice surveyors, architects, estate agents, housing officers and anyone involved in the management and maintenance of property as well as its construction will benefit hugely from this highly informative full-colour text. Written by the authors of The Construction of Houses, the book is also the natural companion to this bestselling textbook.
This will help us customize your experience to showcase the most relevant content to your age group
Please select from below
Login
Not registered?
Sign up
Already registered?
Success – Your message will goes here
We'd love to hear from you!
Thank you for visiting our website. Would you like to provide feedback on how we could improve your experience?
This site does not use any third party cookies with one exception — it uses cookies from Google to deliver its services and to analyze traffic.Learn More.