Letters on the English author of "Novum Organum" and father of experimental philosophy. Letter 13 is about John Locke and his theories on the immortality of the soul. Letter 14 compares British philosopher Isaac Newton to French philosopher René Descartes. Upon his death in 1727, Newton was compared to Descartes in a eulogy performed by French philosopher Fontenelle. While the British did not appreciate this comparison, Voltaire argues that Descartes, too, was a great philosopher and mathematician. Letter 15 focuses on Newton's law of universal gravitation. Letter 16 talks about Newton's work with optics. Letter 17 discusses Newton's work with geometry and his theories
International Association for the Philosophy of Law and Social Philosophy for founding a Journal for the philosophy of law on a neo-idealistic basis was from Fritz Berolzheimer, a lawyer and private scholar from Munich. This idea coincided with Kohler‘s distinctive interest in founding new academic enterprises. Both men knew each other from academic correspondence, which derived from the publishing of Berolzheimer‘s five-volume „System der Rechts- und Wirtschaftsphilosophie“ („A system of Philosophy of Law and Economic Philosophy“, 1904–1907/08). This opus dealt not only with Hegel, but also with Josef Kohler‘s philosophy intensively. In 1906, Berolzheimer even wrote an article on „J. Kohler as an philosopher of law“ („J. Kohler als Rechtsphilosoph“).