Bernard Bolzano, Miscellanea Mathematica 17

English summary: On more than two thousand closely written folios, Bolzanos Mathematical Diaries provide a complete account of his scientific development between 1799 and 1844. Using this authentic account, it is possible to date Bolzanos most significant discoveries in mathematics and logic and to reveal his sources which were often almost inaccessible. Furthermore, these records contain supplements to those works already published and to his completed unpublished works. German description: Das Heft 17 der Miscellanea Mathematica aus dem Jahre 1819 enthalt u.a. Untersuchungen uber trigonometrische Funktionen, Kegelschnitte, Reihen, Zerlegung von Figuren in Dreiecke, algebraische Kurven und uber den Begriff der Seite sowie kurze Aufsatze uber die ersten Grunde der Physik und die Deduktion der drei Dimensionen des Raumes.