Florence, Bibliotheca Riccardiana MS. 1234. 75 folios. Paper. 145x110mm. 15th Century. 1. f1-66 [Alchemical treatise, damaged at the beginning. With marginal drawings of alchemical apparatus.] 2. f67-74v Descriptio furni..., secundum docttrinam nobis traditam a Ieronimo et Olfando teutonicis, anno domini 1485. [With figures of furnaces.]