{ "item_title" : "The First Principles Of Railway Signalling (1910)", "item_author" : [" C. B. Byles "], "item_description" : "The First Principles of Railway Signalling is a book written by C. B. Byles in 1910. The book is a comprehensive guide to the principles of railway signalling, which is the system of visual and audible communication used by trains and railway personnel to ensure safe and efficient operation of rail traffic. The book covers a wide range of topics related to railway signalling, including the history of signalling, the various types of signals, the principles of interlocking, the use of block signalling, and the role of the signalman. The book also includes detailed diagrams and illustrations to help readers understand the concepts covered. The First Principles of Railway Signalling is a valuable resource for anyone interested in the history and technology of railways, as well as for railway personnel and enthusiasts.Including An Account Of The Legislation In The United Kingdom Affecting The Working Of Railways And The Provision Of Signalling And Safety Appliances.This scarce antiquarian book is a facsimile reprint of the old original and may contain some imperfections such as library marks and notations. Because we believe this work is culturally important, we have made it available as part of our commitment for protecting, preserving, and promoting the world's literature in affordable, high quality, modern editions, that are true to their original work.", "item_img_path" : "https://covers3.booksamillion.com/covers/bam/1/43/662/840/1436628407_b.jpg", "price_data" : { "retail_price" : "39.95", "online_price" : "39.95", "our_price" : "39.95", "club_price" : "39.95", "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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