{ "item_title" : "Manufacture Of Optical Glass And Of Optical Systems", "item_author" : [" Ordnance Department "], "item_description" : "Manufacture Of Optical Glass And Of Optical Systems: A Wartime Problem, May, 1921 is a book written by the Ordnance Department in 1921. The book provides a detailed account of the challenges faced by the optical industry during the First World War and the measures taken to overcome them. It covers the manufacturing process of optical glass and the production of optical systems, including lenses, telescopes, and binoculars. The book also discusses the technical aspects of optical instruments and the role they played in the war effort. The information provided in the book is based on the experiences of the Ordnance Department and other experts in the field of optics. It is a valuable resource for anyone interested in the history of optics and the technological advancements made during the war.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://covers2.booksamillion.com/covers/bam/1/16/502/572/1165025728_b.jpg", "price_data" : { "retail_price" : "46.95", "online_price" : "46.95", "our_price" : "46.95", "club_price" : "46.95", "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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