Excerpt from Practical Radiography: A Hand-Book of the Applications of the X-Rays As is well known, any ordinary source of electricity, whether a battery, dynamo, friction machine, or what not, has two poles or terminals, relatively described as positive and negative. If these are connected by means of a wire we form what is known as a circuit; and when the battery (etc.) is in action a current of electricity passes along the wire. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.

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Excerpt from Practical Radiography: A Handbook for Physicians, Surgeons, and Other Users of X-Rays The first edition of this book, - the earliest handbook of radiography in any language, - was issued in May of 1896, when the subject was less than six months old. In 1898 the subject had so far grown in importance that a second edition, entirely re-written, seemed necessary. In this winter, 1901-2, when radiography is recognized as a most valuable aid to the physician and surgeon, when its methods have become relatively permanent, and its apparatus and materials are fairly perfect, a third edition, much larger and more important than the others, seems necessary. In introducing it the authors wish to acknowledge most gratefully the assistance which has been so cheerfully given to them by radiographers in many parts of the world, but especially by the members of The Rontgen Society and its secretary. They have also to acknowledge the kindness of many firms and friends in placing electros of their apparatus at their disposal. Among others may be mentioned Baird & Tatlock; A. F. Cossor; Harry Cox, Limited; A. E. Deane of London; T. Ernecke, Berlin; A. W. Hirschmann, Berlin; Max Kohl, Chemnitz; Newton & Co.; Rebman & Co.; The India Rubber Works Co.; and James Wimshurst. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.