Leiden MS. Vossianus Chym. F. 22. 250 folios. Paper. 310x200mm. 16th Century. 1. f1-46 Alchemia et remediorum liber [in Latin and German.] 2. f47-58r Tractatus de vino cerevisia et aceto [in Latin.] 3. f59-95 Semita directa [in German.] 4. f96-134v [Chemical recipes, in Latin and German.] 5. f135-152 Verissimum fundamentum Philosophiae [in German.] 6. f153-169 Probatissimum excerptum verae philosophiae [in German.]