The handbook on logic which the private lecturer G. B. Jäsche published in 1800 at the behest of Kant drawing on his records and also on lecture notes quickly became an integral part of Kant's works. It has found its way into all the complete editions and has again and again been used to interpret the 'Kritik der reinen Vernunft' (Critique of Pure Reason), which was written primarily with the logic as its guideline. Since the notes of Kant which Jäsche used were written over a period of about 40 years, his handbook reflects the fluctuations in Kant's thinking. Numerous contradictions contained in the text have their roots here. The circumstances described make a lexical interpretation of precisely this work necessary. The second volume of the Kant Index is the first attempt to provide an aid for a comparison of this nature. A completely lemmatized index of places where words can be found and concordance lines enable a quick overview of the text. Numerous separate indexes, a list of the reflections used by Jäsche as well as a list of typographical errors for Volume IX of the Academy edition provide further tools.
