This manuscript is an important miscellany of practical and theoretical alchemical texts with a full-page drawing of alchemical instruments reflecting the activities of a fifteenth-century alchemist. The manuscript was…

The Liber de secretis naturae seu de quinta essentia is the central work in the Pseudo-Lullian Alchemical corpus, a large collection of as many as 143 different texts that circulated as the work of Raymond Lull (Ramon…