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Excerpt from The Principles of Radiography
The kind of electricity excited on a glass rod by rubbing it with silk was called vitreous, but is now known as positive electricity while the kind excited on an ebonite rod by rubbing it with flannel was called resinous, but is now always called negative electricity. The terms positive and negative arose from the fact that if equal quantities of vitreous and resinous electricity are placed on the same body, the latter shows no signs of electrification. The result of adding together equal quantities of vitreous and resinous electricity is thus zero, and this result can be expressed mathematically by assi'gn ing a positive Sign to the one and a negative Sign to the other. It is therefore a convenience in the mathematical theory of electricity to regard the two kinds of electricity as being of Opposite Sign.
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The Principles of Radiography (Classic Reprint)
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Paperback. Condizione: New. Print on Demand. This book provides an accessible introduction to the physical principles underpinning the production and use of radiograms. The text avoids complex mathematics, presenting concepts in a way that makes them understandable to readers with a limited scientific background. The book begins with an overview of electrical phenomena, covering topics such as electrical attractions, conductors, and insulators. It then introduces the concept of X-rays and the X-ray tube, before delving into the generation of high-tension currents and the X-ray installation. The author also discusses the practical aspects of producing a radiogram and the localization of foreign bodies. The book concludes with a chapter on the principles of radiology. Written by an experienced author, this book will be of value to anyone seeking to understand the scientific principles of radiography. This book is a reproduction of an important historical work, digitally reconstructed using state-of-the-art technology to preserve the original format. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in the book. print-on-demand item. Codice articolo 9781333756086_0
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