{ "item_title" : "Simultaneous Telephony and Telegraphy", "item_author" : [" Chas Stanley Rhoads", "Louis Casper "], "item_description" : "In Simultaneous Telephony and Telegraphy, Chas. Stanley Rhoads and Louis Casper provide a comprehensive technical exploration of the methods used to maximize the efficiency of wire communication systems. Written during a pivotal era in the evolution of electrical engineering, this work details the intricate processes involved in transmitting telephone and telegraph signals concurrently over the same circuits without mutual interference.The text covers the fundamental principles of composite and simplex circuits, circuit design, and the specialized equipment required for successful simultaneous transmission. By addressing the challenges of induction, line balance, and noise reduction, the authors offer a deep dive into the practical applications of telegraphy and telephony at a time when long-distance communication was rapidly expanding. This work serves as an essential primary source for those interested in the history of telecommunications, electrical engineering, and the technical infrastructure that paved the way for modern connectivity.As an authoritative manual, Simultaneous Telephony and Telegraphy captures the state of electrical science in the late 1920s, making it a valuable resource for historians of technology and engineering professionals seeking to understand the foundations of early signal processing.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 was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you may see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work.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.As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.", "item_img_path" : "https://covers2.booksamillion.com/covers/bam/1/02/598/684/1025986849_b.jpg", "price_data" : { "retail_price" : "31.95", "online_price" : "31.95", "our_price" : "31.95", "club_price" : "31.95", "savings_pct" : "0", "savings_amt" : "0.00", "club_savings_pct" : "0", "club_savings_amt" : "0.00", "discount_pct" : "10", "store_price" : "" } }

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