XIV

In the XXXII chapter of the secondo book of De occulta philosophia Cornelius Agrippa quotes an advice by the Arabian astronomer Thabit, about how to capture a specific star virtus, by picking up the stone and the herb associated to it, when the Moon stands in good aspect with the star itself.

James of Viterbo is the author of a collection of nearly 225 sermons, transmitted only by an autograph code.

James of Viterbo is considered the author of a Lectura in IV libros Sententiarum. Before the publication of Stegmüller's Repertorium Commentariorum in Sententias Petri Lombardi, the Lectura was believed to be transmitted only by the code G V 15 of the Biblioteca Comunale of Siena.

Capitulum de arbore borissa is a short treatise containing the magical, alchemical and medical explanation of borissa, a plant that belongs to the genre of Lunariae.