Contents The letter is attributed to Ramon Llull (c. 1232-c. 1315), a polymath of great fame who paved to way to subsequent knowledge in many fields such as mathematics, logic, and theology. Several texts have been falsely attributed to Llull and started to circulate under his name from the 14th century; many of these texts concern alchemy. This particular letter deals with the process of shortening (accurtatio) the processes needed in order to obtain the...

Contents During the Middle Ages, several Latin works which show no connections with his surviving Greek writings have been attributed to the Greek philosopher Aristotle (384/3 BC - 322 BC), one of the greatest intellectual authorities of the period. This manuscript is the only witness of this short text which concerns a dream about the perfection of the philosophers' stone.It begins on f. 129r and it is introduced by the words Incipit somnium preclarissimi...

Contents The Tractatus de lapide philosophico is a treatise on the Philosoper's Stone, the legendary alchemic substance which was supposed to transform a base metal into a precious one, i.e. gold or silver. The treatise was attributed to the famous philosopher and theologian Thomas Aquinas (1225-1274), but intertextual relationships with other texts suggest a date of composition after 1351-52, well after his death. The attribution to Thomas Aquinas might have been...