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Titel: Schola Steganographica, in classes octo ...
Verlag: Nuremberg, Jobst Hertz for Johann Andreas and Wolfgang Endter, 1665
4to (224 x 162 mm), pp [xxxvi, including half-title and additional engraved title/frontispiece] 346 , title in red and black, with engraved additional title/frontispiece, engraved arms on verso of letterpress title, 4 folding engraved plates of instruments, 4 folding engraved plates of tables, 3 folding letterpress tables, and 6 engravings in the text; some marginal spotting, two gatherings at end browned, a very attractive copy in contemporary vellum, inscription on endleaf 'Ex libris Claudii Boissin I.V.D.' £2250First edition of Schott's treatise on cryptography. It is largely a compilation of cipher systems inspired by, or derived from, Athanasius Kircher, who had published his own Polygraphia on the subject two years earlier. Schott (1608-1666) was Kircher's chief disciple and advocate, and his publications are important supplements to those of his mentor.The work discusses different encrypting and deciphering systems, along with the mechanical instruments involved in some. Schott presents cryptographer's cases of his own invention, the 'Arca Glottotactica' and the 'Cistula Steganographica' and a 'Mensula Steganographica'. The cases resemble typographers' cases and work by creating permutations of different sets of substituted letters and numbers. There are various devices including rotary dials and encrypting clocks described and illustrated, and also a system of musical encryption, with musical scores printed in the text. There is further discussion of other methods of secret communication, including sign language and magnetic signalling.The final leaf of text lists various publications by, or edited by, Schott.BL 17th-C German S1254; Sommervogel VIII 910 12. Buchnummer des Verkäufers 2462
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