Military intelligence, grossly neglected during the interwar period, had by mid-1942 proved itself indispensable through information gathered from intercepted radio messages in the supposedly unbreakable German Enigma cipher. Ralph Bennett, who worked for four years at Bletchley Park as a senior producer of the intelligence (Ultra') derived from the Enigma decrypts, illustrates in this collection of reprinted essays some of the steps by which he and others developed the new type of information and in the process a candid glimpse of the workings of British intelligence both past and present.
Military intelligence, grossly neglected in the interwar period, had by mid-1942 proved itself an indispensable instrument of war through the exploitation of radio intelligence derived from decrypts ('Ultra') of the supposedly unbreakable German Enigma cipher. Ralph Bennett, who worked for four years as a senior producer of Ultra at Bletchley Park, illustrates in this collection some of the steps by which he and others developed a new type of history from an archive they had themselves created. This new history, based on practical utility being the primary concern of intelligence, spurned the concept of 'must have been' and rigidly separated supposition from securely ascertained fact. In further essays he goes on to tackle subjects as disparate as the battle of Crete (1941) and the integration of decrypt intelligence with that from double-cross agents. At the end of his fascinating account, he concludes that his wartime experiences have left him with an enhanced regard for strict logical proof - the sine qua non of military intelligence - and with the conviction that historians should shun the speculation which mars so much 'ordinary' history.
This textbook is a product of William Bennett’s work in developing and teaching a course on the physics of music at Yale University to a diverse audience of musicians and science students in the same class. The book is a culmination of over a decade of teaching the course and weaves together historical descriptions of the physical phenomena with the author’s clear interpretations of the most important aspects of the science of music and musical instruments. Many of the historical examples are not found in any other textbook available on the market. As the co-inventor of the Helium-Neon laser, Prof. Bennett’s knowledge of physics was world-class. As a professor at one of the most prestigious liberal-arts universities in the world, his appreciation for culture and humanities shines through. The book covers the basics of oscillations, waves and the analysis techniques necessary for understanding how musical instruments work. All types of stringed instruments, pipe organs, and the human voice are covered in this volume. A second volume covers the remaining families of musical instruments as well as selected other topics. Readers without a background in acoustics will enjoy learning the physics of the Science of Musical Sound from a preeminent scientist of the 20th century. Those well versed in acoustics will discover wonderful illustrations and photographs depicting familiar concepts in new and enlightening ways.
The author evaluates the properties of low-frequency electromagnetic fields and their interactions with the human body, exploring the possible link to cancer, and concludes that the health risks from these interactions have been vastly overstated.
Detailed and timely information on accommodations, restaurants, and local attractions highlight these updated travel guides, which feature all-new covers, a two-color interior design, symbols to indicate budget options, must-see ratings, multi-day itineraries, Smart Travel Tips, helpful bulleted maps, tips on transportation, guidelines for shopping excursions, and other valuable features. Original.
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