 Thomasius’ works cover a wide range of topics. In addition to the topical essays and dissertations already mentioned, Thomasius published major texts on natural law, including the Institutiones jurisprudentiae divinae (Institutions of Divine Jurisprudence) of 1688 and the Fundamentum iuris naturae et gentium (Foundations of the Law of Nature and Nations) of 1705 (for discussion of Thomasius’ contributions to natural law theory, which will not be taken up here, see especially Hochstrasser 2000: ch. 4; Kühnel 2001; and Lutterbeck 2002). Thomasius also published on topics in theoretical and practical philosophy, especially during his time in Halle. Thomasius wrote a number of texts on logic, such as the Introductio ad philosophiam auliam (Introduction to Court Philosophy) of 1688, as well as the Einleitung zur Vernunfft-Lehre (Introduction to the Doctrine of Reason) and the Ausübung der Vernunfft-Lehre (Application of the Doctrine of Reason) both of 1691. These were followed by a parallel exhibition of his moral philosophy in the Einleitung zur Sitten-Lehre (Introduction to the Doctrine of Morals) of 1692 and the Ausübung der Sitten-Lehre (Application of the Doctrine of Morals) of 1696, as well as an influential excursion into metaphysics in the Versuch von Wesen des Geistes (Essay on the Essence of Spirit) in 1699 (second edition 1709).