J. V. Field

Whitfield Diffie

James A. Reeds

This book is an edition of the General Report on Tunny with commentary that clarifies the often difficult language of the GRT and fitting it into a variety of contexts arising out of several separate but intersecting story lines, some only implicit in the GRT. Explores the likely roots of the ideas entering into the Tunny cryptanalysis Includes examples of original worksheets, and printouts of the Tunny–breaking process in action Presents additional commentary, biographies, glossaries, essays, and bibliographies

General Report on Tunny with Emphasis on Statistical Methods (1945)

Breaking Teleprinter Ciphers at Bletchley Park: An Edition of I.J. Good, D. Michie and G. Timms

Kepler is a key figure in the development of modern astronomy. His work is also important in the history of philosophy and methodology of science as a whole. The present study is concerned with one of Kepler's major preoccupations, namely his search for the geometrical plan according to which God created the Universe. The author discusses how Kepler's cosmological theories, which embrace music and astrology as well as astronomy, are related to his other work. The subject will be of great interest to historians of science, mathematicians and astronomers as well as to historians of the late Renaissance.

J. V. Field

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