This edition has been completely revised to cover the latest methods of gem enhancement and identification, as well as the most up-to-date test instruments and laboratory techniques.
This edition has been completely revised to cover the latest methods of gem enhancement and identification, as well as the most up-to-date test instruments and laboratory techniques.
Beginner's Guide to Gemmology presents the profiles of the principal gem materials. This book discusses the interesting characteristics of gemstones as the growing consumer market jewelry resulted in increased sales of gem testing instruments. Organized into 12 chapters, this book begins with an overview of the development of the science of gemmology. This text then explains the fundamental qualities necessary in a gem, including color, hardness, specific gravity, crystallography, refractive index, pleochroism, critical angle, luminescence, and absorption spectra. Other chapters consider the organic gem materials, including amber, ivory, coral, tortoiseshell, jet, ebony, and pearl. This book discusses as well the various methods used in the production of man-made gemstones and the commercial use in gem testing. The final chapter deals with the composition of synthetic gemstones. This book is a valuable resource for gemmologists and jewelers. Students who intend to become a qualified gemologist will also find this book extremely useful.
Gemmological Instruments deals with the developments in diamond grading equipment and gem testing instruments since the publication of the first edition in 1978. These developments include improvements in the versatility and styling of existing instruments such as the reflectivity meter, the composite spectroscope, and the refractometer. It also addresses the criticisms in the first edition and provides a discussion of the advantages and disadvantages of different gem testing equipment. This book is organized into 16 chapters that describe groundbreaking instruments like the thermal conductivity diamond testers and home-constructed items that while innovative have not yet been commercialized. There are also chapters dealing with microphotography and identification of synthetics and stimulants. This book also provides a listing of gemstone constants and characteristic inclusions in natural and synthetic gemstones. This book will be of interest to people interested in equipment for gem testing and diamond grading.
This text provides an application oriented introduction to the numerical methods for partial differential equations. It covers finite difference, finite element, and finite volume methods, interweaving theory and applications throughout. The book examines modern topics such as adaptive methods, multilevel methods, and methods for convection-dominated problems and includes detailed illustrations and extensive exercises.
The dynamic Peter G. Mott is in true form, capturing the hearts and minds of all that read "First Peter: The Poetic Revolution"--an awesome book of Holy Spirit-anointed poetry guaranteed to reconstruct, renew, and revitalize readers' thoughts and change their lives inside-out.
One of the key tools in effectively managing critical illness is the use of mechanical ventilator support. This essential text helps you navigate this rapidly evolving technology and understand the latest research and treatment modalities. A deeper understanding of the effects of mechanical ventilation will enable you to optimize patient outcomes while reducing the risk of trauma to the lungs and other organ systems. A physiologically-based approach helps you better understand the impact of mechanical ventilation on cytokine levels, lung physiology, and other organ systems. The latest guidelines and protocols help you minimize trauma to the lungs and reduce patient length of stay. Expert contributors provide the latest knowledge on all aspects of mechanical ventilation, from basic principles and invasive and non-invasive techniques to patient monitoring and controlling costs in the ICU. Comprehensive coverage of advanced biological therapies helps you master cutting-edge techniques involving surfactant therapy, nitric oxide therapy, and cytokine modulators. Detailed discussions of both neonatal and pediatric ventilator support helps you better meet the unique needs of younger patients.
Presented here, in paperback for the first time, is John Peter Lange's Theologischhomiletisches Bibelwerk. Intended to help preachers prepare sermons the commentary series is essentially biblical and evangelical catholic. This 19th century commentary has served as a standard reference for more than a century. Many early reviewers regarded Schaff's edition with his additional material as superior to the original. It has proven to be a complete and useful Commentary and continues to prove especially valuable to ministers. It contains critical annotations of the text and its translation, and a threefold commentary, exegetical, doctrinal, and homiletical. Under these three heads the text is viewed from every aspect.
Cambridge IGCSE® English as a Second Language Teacher's Book is part of the series of resources which supports teachers and students through studying for the Cambridge IGCSE® or equivalent courses and accompanies the Cambridge IGCSE® English as a Second Language Coursebook and Workbook. The series is written by an experienced ESL teacher and trainer, and includes answers to all of the exercises in the Coursebook and Workbook. It features Top Tips to help teachers with the course and Differentiated Activities to stretch able students while supporting those that need more help.
Since it first appeared over 500 years ago, the Elucidation of Necromancy (Lucidarium artis Nigromantice) and the closely related Heptameron have become essential guides for individuals seeking to call on angels and other supernatural beings for help. Countless amulets and pendants have been made with its designs, and elements have repeatedly been adapted and incorporated into other manuals of ritual magic. In spite of this, neither a critical edition nor a translation has been previously published. In particular three manuscripts of Lucidarium have come to light recently, which provide a clearer and fuller ritual than the printed Heptameron. For example, they add critical instructions for making the seven angel sigils, which have become so widely known. Together they bring to life this important current of esoteric tradition, showing how it has been repeatedly adapted and used by different individuals for centuries.
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