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Many of the earliest books, particularly those dating back to the 1900s and before, are now extremely scarce and increasingly expensive. We are republishing these classic works in affordable, high quality, modern editions, using the original text and artwork.
This fascinating text comprises a detailed guide to gemmology, perfect for the aspiring amateur and seasoned practitioner alike. Covering in detail the fundamentals of the subject, this rare book constitutes a great addition to any gemmological collection and is a veritable must-have for those looking for an introduction to the subject. This text is split into the two parts: Transparent Stones and Translucent and Opaque Stones, and contains chapters on: The Materials to be Studied; The ¿Bending¿ of light, and its Effects; The Pocket Lens; ¿Inclusion¿ in Stones; The ¿Chelseä filter; The Microscope; and many more. G. M. Sprague was a fellow, Tully medallist, and Anderson prize-winner of the Gemmological Association of Great Britain. This rare text is proudly republished here with a new introduction to the subject.
Heaviside's Operational Calculus Made Easy by T. H. Turney is a user-friendly guide to understanding the operational calculus methods developed by Oliver Heaviside, offering readers a simplified approach to a powerful mathematical tool used in engineering and physics. Heaviside's Operational Calculus Made Easy by T. H. Turney is a valuable resource for students and professionals looking to master the operational calculus techniques introduced by Oliver Heaviside. This book serves as an accessible and comprehensive introduction to the principles and applications of operational calculus. The book begins by providing readers with an introduction to the historical context and significance of operational calculus, highlighting its relevance in solving differential equations and analyzing complex systems. T. H. Turney's clear explanations set the stage for a deeper exploration of this essential mathematical tool. Central to the book is the presentation of operational calculus methods, including Laplace transforms, inverse transforms, and convolution, in a manner that is easy to follow and apply. Readers will find practical examples, step-by-step solutions, and exercises that enhance their understanding and problem-solving skills. Furthermore, the book emphasizes the real-world applications of operational calculus in engineering, physics, and other scientific disciplines. It showcases how operational calculus is used to simplify complex mathematical problems and streamline the analysis of dynamic systems. This book is an indispensable resource for students, engineers, physicists, and anyone seeking to master operational calculus techniques. T. H. Turney's accessible explanations and practical examples make this work an essential companion for those looking to make operational calculus easy to understand and apply.
Many of the earliest books, particularly those dating back to the 1900s and before, are now extremely scarce and increasingly expensive. We are republishing these classic works in affordable, high quality, modern editions, using the original text and artwork.
From one of the greatest novelists in the English language, Poor Richard is an early short story by Henry James exploring one man's growth and success alongside one woman's faithlessness.First published in 1867, Poor Richard is an engaging short story warning about the dangers and unreliability of women. Penniless and orphaned, Richard Maule seeks to make the wealthy Gertrude Whittaker his wife. As he chases the girl, Richard reforms his life and begins to make a success of himself. But will Gertrude see the changes he's making or will she continue to toy with various men's hearts?Henry James wrote this short story with influence from Benjamin Franklin's annual publication, Poor Richard's Almanack. The periodical was published between 1732 and 1758, and it collated various articles and columns, including practical tips, weather forecasts, and industry-related observations.
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