Amateur faceter Tom Herbst lays out the steps necessary to transform a shapeless lump of rock into a glittering jewel that is unique and valuable. Along the way, he explains not only the "how" but also the "why," and provides helpful tips in dealing with many of the pitfalls that confront the beginning gem cutter.
Rhizobia are bacteria which inhabit the roots of plants in the pea family and "fix" atmospheric nitrogen for plant growth. They are thus of enormous economic importance internationally and the subject of intense research interest. Handbook for Rhizobia is a monumental book of practical methods for working with these bacteria and their plant hosts. Topics include the general microbiological properties of rhizobia and their identification, their potential as symbionts, methods for inoculating rhizobia onto plants, and molecular genetics methods for Rhizobium in the laboratory. The book will be invaluable to Rhizobium scientists, soil microbiologists, field and laboratory researchers at agricultural research centers, agronomists, and crop scientists.
The most comprehensive overview available, this Handbook is an essential guide to sociolinguistics today. Reflecting the breadth of research in the field, it surveys a range of topics and approaches in the study of language variation and use in society. As well as linguistic perspectives, the handbook includes insights from anthropology, social psychology, the study of discourse and power, conversation analysis, theories of style and styling, language contact and applied sociolinguistics. Language practices seem to have reached new levels since the communications revolution of the late twentieth century. At the same time face-to-face communication is still the main force of language identity, even if social and peer networks of the traditional face-to-face nature are facing stiff competition of the Facebook-to-Facebook sort. The most authoritative guide to the state of the field, this handbook shows that sociolinguistics provides us with the best tools for understanding our unfolding evolution as social beings.
How many readers does it take to change a light bulb? Only one . . . if he or she is armed with this book! Rather than focus on the big projects that most homeowners would wisely leave to professionals, it concentrates on the common repairs that everyone encounters and anyone can do—with the right instruction—including repairing holes and dents in drywall; fixing popped nails in walls; checking and replacing fuses; unclogging drains; replacing light fixtures; fixing squeaky floors; repairing cracked tile and damaged carpet; replacing screens; screening gutters; and much more. • Contains 250 to 300 step–by–step illustrations
Amateur faceter Tom Herbst helps you expand your faceting horizons. You will learn about the optics and mathematics behind the magic of gemstones. Subsequent chapters on the properties and treatment of common gem materials will help you identify and make the most of your valuable rough.