Electro Medical Instruments And Their Management And Illustrated Price List Of Electro Medical Apparatus Classic Reprint

This work has been selected by scholars as being culturally important and is part of the knowledge base of civilization as we know it. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. To ensure a quality reading experience, this work has been proofread and republished using a format that seamlessly blends the original graphical elements with text in an easy-to-read typeface. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.

Excerpt from Illustrated Catalogue of Electro-Medical Instruments: Manufactured and Sold by Thomas Hall, Successor to Palmer and Hall, Electrician, Manufacturer and Importer of Magnetic Galvanic, and Telegraphic Instruments The manufacturing of Magnetic and Galvanic Instru ments was first commenced in this country by Mr. Daniel Davis, Jr., in the year 1836. Previous to that time, all the Galvanic Instruments used in this country were imported from Europe. Mr. Davis, having had an old induction coil to repair, saw the principle upon which it acted, and made one for amusement, with some improvement upon the one he repaired. He found a ready sale for it. This induced him to engage in the manufacture of them. At that time they were very rough and inconvenient instruments, com pared with those we now make. They ware very seldom used for medical purposes. The mode of breaking the cur rent was by means of a ratchet placed on the top or by the side of the coil. This was a great objection to them for medical purposes, as the Shocks came very irregularly; this was remedied by the invention and adoption of the vibrat ing armatures in connection with the secondary coils con trived by Mr. Davis. It is now universally used for this purpose both in this country and Europe. By this in genious arrangement the instruments are self-operating, and the current is extremely fine. Making induction coils led to making models for motive power, and various pieces of apparatus to illustrate galvanism and electro-magnetism. The adoption of this branch of physical science in our 001 leges and schools created a constant demand for this class of instruments, so that we now manufacture over five hun dred distinct instruments adapted to this branch of studies. 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.

This work has been selected by scholars as being culturally important and is part of the knowledge base of civilization as we know it. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. To ensure a quality reading experience, this work has been proofread and republished using a format that seamlessly blends the original graphical elements with text in an easy-to-read typeface. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.

This book was originally published in 1980. Owing to the increasing use of electronic instrumentation in medical practice it was desirable that medical and nursing personnel have some technical knowledge of electronic equipment. It was the aim of this volume to help those members of the medical profession to develop this knowledge. The reader will find a survey of basic principles and methods, with illustrations of the applications in the most common fields of medical practice, for instance the registration of cardiac activity by means of the ECG. More complicated instrumental systems, such as those used for intensive care, are discussed in the light of the basic principles. These include acquaintance with three important concept in electricity: voltage, current and resistance.