Wolfenbüttel, Herzog-August-Bibliothek MS. August 3721. [66. Aug. 8vo.] 263 folios. Paper. 150x105mm. 15th Century [1467.] 1. f1-91 Liber de magni lapidis compositione et operatione. 2. f92-95v [Chemical recipes.] 3. f97-137v Rosa aurea lapidis. 4. f137v-140 [Alchemical recipe in German.] 5. f155-196 Rosarius, i.e. [H]ortus rosarum philosophorum [in two books. Ascribed to Johannes Rupescissa?] 6. f196v-205 Enigmata philosophorum. 7. f205 Coagulatio aquarum. 8. f206-207 [Chemical recipe in German.] 9. f211 Thesaurus, cui nihil potest conparari sub celo. 10. f212-217v Tractatus St. Thome predicatorum ordinis, von Alchimia. 11. f218v-220v [Chemical and other recipes, in German.] 12. f221-252v Semita Alberti Magni in Alchimiam. 1468. Laugingen. 13. f253-257v Johannis Rubicisse [Rupescissa] de aqua vitae rectificata. 14. f257v-263v [Various chemical recipes, some in Latin and some in German.]