Vienna, Österreichen Nationalbibliothek MS. 5491 [Med.164.] 49 folios. 15th Century. 1. f1 'Bifolium regis Salominis.' 2. f2-10v 'Thesaurus philosophiae.' 3. f10v-24v [Various formulae and diverse experiments partly in Latin and partly in German.] 4. f25-26 [Letters concerning the virtues of the stone in human life.] 5. f26v-31 Arysleus. Liber chemicus. 6. f31-36v [Various formulae and diverse experiments partly in Latin and partly in German.] 7. f37-49v Johannes de Rupescissa. Tractatus de consideratione quintae essentiae epitomatus.