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,16mo. Contemporary vellum. Lacks title-page and the two dedications, engraved frontispiece (loose) and 110 plates. Title-page a little frayed at edges, some foxing, more noticable on the plates, worming to covers and end-papers and just touching the frontis. Title in ink to spine, ink inscriptions to front and rear endpapers. Bookplate of the Canonical library of Peter and Paul in Weyarn. The gnomonic is the science which is responsible for developing theories and assembling knowledge about the division of ' diurnal arc , the trajectory of the sun on the horizon, through the use of specific projections on different surfaces. This science is very useful to the design and construction of sundials as well as in cartography ( gnomonic projection ). There was a moment in the history of ' clock in which the sundials have been of great importance, since they were the only instruments capable of giving the time accurately enough for regular daily life. For this reason, the gnomonic himself as a science with a major contribution to the life of society at that time. From the library of Stephanos Carathèodory with his engraved bookplate and his gilt monogram on the spine. Stephanos Carathéodory, was an Ottoman Greek who had studied law in Berlin and then served as secretary in the Ottoman embassies in Berlin, Stockholm and Vienna. Stephanos had married Despina Petrocochino, who came from a Greek family of businessmen who had settled in Marseille. At the time of his son Constantin's birth, the family were in Berlin since Stephanos had been appointed there two years earlier as First Secretary to the Ottoman Legation. The Carathéodory family, originally from Bosnochori or Vyssa, was well established and respected in Constantinople, and its members held many important government positions. Stephanos Carathèodory was the father of Constantin Carathéodory (or Constantine Karatheodori) (Greek: ???sta?t???? ?a?a?e?d???) (13 September 1873 2 February 1950) was a Greek mathematician. He made significant contributions to the theory of functions of a real variable, the calculus of variations, and measure theory. His work also includes important results in conformal representations and in the theory of boundary correspondence. In 1909, Carathéodory pioneered the Axiomatic Formulation of Thermodynamics along a purely geometrical approach. Known correspondence of Carathéodory-Einstein can be seen as facsimile in Einstein Archives Online (11 items). Three letters concern mathematics and these are printed in vol.8 of Einstein's Collected Works (Princeton Univ. Press 1987). Seller Inventory # 016211
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