Leiden MS. Vossianus Chym. F. 13. 453 folios. Paper. 310x196mm. 16th Century. 1. f1-5 [Various recipes.] 2. f6-25 Epistola Haimonis de quatuor lapidibus philosophicis [in German.] 3. f26-56 Tractatulus de lapide philosophorum [in German.] 4. f58-84v Magister Balcorinus Graecus et Constantinopolitanus, De perfecta alchimia. [in German.] 5. f85-152 Operatio vera chemica [in German.] 6. f153-166 Bibliotheca chemica [in German.] 7. f167-171 [Alexander, Epistola de alchimia, in German.] 8. f171-176 Ein exempell oder gleichnis unserer kunst. 9. f176-178v [Questions about necromancy, followed by a reply from Hermes, in German.] 10. f179-197 Kalid [?], Liber de secretis alchimiae [in German.] 11. f198-207 Flores philosophorum [in German.] 12. f207v-209v Tractatus de tincturis [in German.] 13. f210-283 Artificia varia [in German.] 14. f283v-336v Jacques de Nuremberg et André d'Erfurt, Augmentum [in German.] 15. f336-337 [Action concenring the grace from God, in German.] 16. f338v-350 De mercurio philosophorum [in German.] 15. f350-388v Medicinae [in German.] 16. f389v-444v [Veterinary, medical and alchemical pharmocopoea, in German.] 17. f445 [Fragment of a German poem, concerning the lamentations of Prometheus to Jupiter.] 18. f446-447 [[Letters, etc., concerning Leonard Thurneysser.]